2,334 results on '"Triazolam"'
Search Results
52. A Hemilabile and Cooperative N-Donor-Functionalized 1,2,3-Triazol-5-Ylidene Ligand for Alkyne Hydrothiolation Reactions.
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Strydom, Ian, Guisado‐Barrios, Gregorio, Fernández, Israel, Liles, David C., Peris, Eduardo, and Bezuidenhout, Daniela I.
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TRIAZOLAM , *LIGANDS (Chemistry) , *CHEMICAL reactions , *ALKYNES , *CATALYSTS - Abstract
A series of novel cationic and neutral Rh complexes with an N-donor-functionalized 1,2,3-triazol-5-ylidene (TRZ) ligand (in which the pendant N donor is NHBoc, NH2, or NMe2) is described. The catalytic activity of these complexes was evaluated in the hydrothiolation of alkynes. Among the catalysts, a neutral dicarbonyl complex featuring the tethered-NBoc amido-TRZ ligand proved very selective for alkyne hydrothiolation with an aryl thiol. Remarkably, the reaction could be carried out in the absence of pyridine or base additive. In addition, during the reaction, no evidence for oxidative addition of the thiol S−H bond was observed, strongly suggesting a reaction pathway in which a bifunctional ligand is involved. Experimental and theoretical mechanistic investigations suggest a ligand-assisted deprotonation of thiol, hemilabile dissociation of amine from the metal, and thiolate coordination, which is indicative of a different reaction mechanism to those previously reported for related alkyne hydrothiolation reactions. [ABSTRACT FROM AUTHOR]
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- 2017
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53. Effects of acute buspirone administration on inhibitory control and sexual discounting in cocaine users.
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Strickland, Justin C., Bolin, B. Levi, Romanelli, Michael R., Rush, Craig R., and Stoops, William W.
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COCAINE , *SUBSTANCE abuse , *RESPONSE inhibition , *TRIAZOLAM , *DRUG therapy , *BUSPIRONE - Abstract
Objective Cocaine users display deficits in inhibitory control and make impulsive choices that may increase risky behavior. Buspirone is an anxiolytic that activates dopaminergic and serotonergic systems and improves impulsive choice (i.e., reduces sexual risk-taking intent) in cocaine users when administered chronically. We evaluated the effects of acutely administered buspirone on inhibitory control and impulsive choice. Methods Eleven subjects with a recent history of cocaine use completed this within-subject, placebo-controlled study. Subjects performed two cued go/no-go and a sexual risk delay-discounting task following oral administration of buspirone (10 and 30 mg), triazolam (0.375 mg; positive control), and placebo (negative control). Physiological and psychomotor performance and subject-rated data were also collected. Results Buspirone failed to change inhibitory control or impulsive choice; however, slower reaction times were observed at the highest dose tested. Buspirone did not produce subject-rated drug effects but dose-dependently decreased diastolic blood pressure. Triazolam impaired psychomotor performance and increased ratings of positive subject-rated effects (e.g., Like Drug). Conclusions These findings indicate that acutely administered buspirone has little impact on behavioral measures of inhibitory control and impulsive sexual decision-making. Considering previous findings with chronic dosing, these findings highlight that the behavioral effects of buspirone differ as a function of dosing conditions. [ABSTRACT FROM AUTHOR]
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- 2017
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54. 1,2,4-Triazol-5-ylidenes versus Imidazol-2-ylidenes for the Stabilization of Phosphorus(I) Cations.
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Elnajjar, Fawzia O., Binder, Justin F., Kosnik, Stephanie C., and Macdonald, Charles L. B.
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TRIAZOLES synthesis , *TRIAZOLAM , *IMIDAZOLES , *TETRAPHENYLBORATES , *LIGANDS (Chemistry) - Abstract
The synthesis and characterization of a series of 1,4-dialkyl-1,2,4-triazolium iodide and tetraphenylborate salts featuring methyl, ethyl, and isopropyl substituents and their use as precursors, in conjunction with triphosphenium reagents, to generate 1,4-dialkyl-1,2,4-triazol-5-ylidene-stabilized phosphorus(I) ions is described. The use of tetraphenyl borate salts of both reagents produces the most pure products. The structural and spectroscopic features of the products are compared to those of analogous ions featuring 1,3-imidazol-2-ylidene ligands. [ABSTRACT FROM AUTHOR]
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- 2016
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55. Fluoxetine does not enhance visual perceptual learning and triazolam specifically impairs learning transfer
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Alice Kitty Lagas, Joanna Mary Black, Winston D. Byblow, Melanie Kate Fleming, Lucy Goodman, Rob Kydd, Bruce Russell, Cathy Stinear, and Benjamin Thompson
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Fluoxetine ,GABA Agonists ,Learning ,Motion Perception ,Serotonin Uptake Inhibitors ,Triazolam ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
The selective serotonin reuptake inhibitor fluoxetine significantly enhances adult visual cortex plasticity within the rat. This effect is related to decreased gamma-aminobutyric acid (GABA) mediated inhibition and identifies fluoxetine as a potential agent for enhancing plasticity in the adult human brain. We tested the hypothesis that fluoxetine would enhance visual perceptual learning of a motion direction discrimination (MDD) task in humans. We also investigated 1) the effect of fluoxetine on visual and motor cortex excitability and 2) the impact of increased GABA mediated inhibition following a single dose of triazolam on post-training MDD task performance. Within a double blind, placebo controlled design, 20 healthy adult participants completed a 19-day course of fluoxetine (n = 10, 20mg per day) or placebo (n = 10). Participants were trained on the MDD task over the final five days of fluoxetine administration. Accuracy for the trained MDD stimulus and an untrained MDD stimulus configuration was assessed before and after training, after triazolam and one week after triazolam. Motor and visual cortex excitability was measured using transcranial magnetic stimulation. Fluoxetine did not enhance the magnitude or rate of perceptual learning and full transfer of learning to the untrained stimulus was observed for both groups. After training was complete, trazolam had no effect on trained task performance but significantly impaired untrained task performance. No consistent effects of fluoxetine on cortical excitability were observed. The results do not support the hypothesis that fluoxetine can enhance learning in humans. However, the specific effect of triazolam on MDD task performance for the untrained stimulus suggests that learning and learning transfer relay on dissociable neural mechanisms.
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- 2016
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56. Learning and memory deficits in male adult mice treated with a benzodiazepine sleep-inducing drug during the juvenile period
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Yusuke Furukawa, Kentaro Tanemura, Katsuhide Igarashi, Maky Ideta-Otsuka, Ken-ichi Aisaki, Satoshi Kitajima, Kitagawa Masanobu, and Jun Kanno
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Triazolam ,zolpidem ,sleep-inducing drug ,GABA receptor signal ,behavioral battery test ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Gamma-aminobutyric acid (GABA), the major inhibitory neurotransmitter in the mammalian central nervous system, is also known to be important for brain development. Therefore, disturbances of GABA receptor (GABA-R) mediated signaling (GABA-R signal) during brain development may influence normal brain maturation and cause late-onset brain malfunctions. In this study, we examined whether the temporal stimulation of the GABA-R signal during brain development induces late-onset adverse effects on the brain in adult male mice. To stimulate the GABA-R signal, we used either the benzodiazepine sleep-inducing drug triazolam (TZ) or the non-benzodiazepine drug zolpidem (ZP). We detected deficits in learning and memory in mice treated with TZ during the juvenile period, as seen in the fear conditioning test. On the other hand, ZP administration during the juvenile period had little effect. In addition, decreased protein expression of GluR1 and GluR4, which are excitatory neurotransmitter receptors, was detected in the hippocampi of mice treated with TZ during the juvenile period. We measured mRNA expression of the immediate early genes (IEGs), which are neuronal activity markers, in the hippocampus shortly after the administration of TZ or ZP to juvenile mice. Decreased IEG expression was detected in mice with juvenile TZ administration, but not in mice with juvenile ZP administration. Our findings demonstrate that TZ administration during the juvenile period can induce irreversible brain dysfunction in adult mice. It may need to take an extra care for the prescription of benzodiazepine sleep-inducing drugs to juveniles because it might cause late onset learning and memory defects.
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- 2016
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57. The challenge that chlorine presented during the development of a benzodiazepine assay
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Richard G. Lahr, Paul J. Jannetto, and Loralie J. Langman
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030213 general clinical medicine ,Analyte ,Triazolam ,Calibration curve ,medicine.drug_class ,Clinical Biochemistry ,chemistry.chemical_element ,030204 cardiovascular system & hematology ,Mass spectrometry ,Benzodiazepines ,03 medical and health sciences ,0302 clinical medicine ,Tandem Mass Spectrometry ,medicine ,Chlorine ,Humans ,Benzodiazepine ,Chromatography ,Isotope ,Isotopes of chlorine ,General Medicine ,Reference Standards ,chemistry ,Calibration ,Chromatography, Liquid ,medicine.drug - Abstract
During the routine validation of a benzodiazepine method (performed on a Liquid Chromatography - Tandem Mass Spectrometer), it was noted that lorazepam, triazolam, and α-hydroxytriazolam showed a quadratic shift/bias in the calibration curve, particularly at high concentrations. The ultimate cause of this bias was determined to be due to the natural presence of chlorine (Cl) isotopes (35Cl and 37Cl) in these benzodiazepines. The presence of the heavy (37Cl) isoforms of Cl resulted in the analyte's mass being the same as the internal standard which, in turn, caused the internal standard to appear "falsely increased", thus skewing the calibration curve. One solution to this potential issue was to take advantage of this natural phenomenon and use the Cl heavy isoforms of the respectively labeled internal standards.
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- 2020
58. Kinetic analysis of sequential metabolism of triazolam and its extrapolation to humans using an entero-hepatic two-organ microphysiological system
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Taku Satoh, Yukio Kato, Hiroko Toyoda, Kazumi Shin, Hiroshi Arakawa, Shinji Sugiura, Takumi Kawanishi, Toshiyuki Kanamori, and Yasuyuki Sakai
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congenital, hereditary, and neonatal diseases and abnormalities ,Triazolam ,CYP3A ,Kinetic analysis ,Pharmacokinetic modeling ,Biomedical Engineering ,Glucuronidation ,Bioengineering ,Pharmacology ,Models, Biological ,Biochemistry ,Pharmacokinetics ,Lab-On-A-Chip Devices ,Tumor Cells, Cultured ,medicine ,Humans ,Chemistry ,General Chemistry ,Metabolism ,Microfluidic Analytical Techniques ,Kinetics ,Liver ,Caco-2 Cells ,Drug metabolism ,medicine.drug - Abstract
The microphysiological system (MPS) is a promising tool for predicting drug disposition in humans, although limited information is available on the quantitative assessment of sequential drug metabolism in MPS and its extrapolation to humans. In the present study, we first constructed a mechanism-based pharmacokinetic model for triazolam (TRZ) and its metabolites in the entero-hepatic two-organ MPS, composed of intestinal Caco-2 and hepatic HepaRG cells, and attempted to extrapolate the kinetic information obtained with the MPS to the plasma concentration profiles in humans. In the two-organ MPS and HepaRG single culture systems, TRZ was found to be metabolized into α- and 4-hydroxytriazolam and their respective glucuronides. All these metabolites were almost completely reduced in the presence of a CYP3A inhibitor, itraconazole, confirming sequential phase I and II metabolism. Both pharmacokinetic model-dependent and -independent analyses were performed, providing consistent results regarding the metabolic activity of TRZ: clearance of glucuronidation metabolites in the two-organ MPS was higher than that in the single culture system. The plasma concentration profile of TRZ and its two hydroxy metabolites in humans was quantitatively simulated based on the pharmacokinetic model, by incorporating several scaling factors representing quantitative gaps between the MPS and humans. Thus, the present study provided the first quantitative extrapolation of sequential drug metabolism in humans by combining MPS and pharmacokinetic modeling.
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- 2020
59. Pharmacological treatment for central sleep apnoea in adults.
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Rocha A, Pinto ACPN, Pachito DV, Drager LF, Lorenzi-Filho G, and Atallah ÁN
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- Male, Adult, Humans, Aged, Female, Carbonic Anhydrase Inhibitors, Buspirone, Apnea, Theophylline, Acetazolamide, Hypnotics and Sedatives, Sleep Apnea, Central drug therapy, Triazolam, Heart Failure, Disorders of Excessive Somnolence
- Abstract
Background: The term central sleep apnoea (CSA) encompasses diverse clinical situations where a dysfunctional drive to breathe leads to recurrent respiratory events, namely apnoea (complete absence of ventilation) and hypopnoea sleep (insufficient ventilation) during sleep. Studies have demonstrated that CSA responds to some extent to pharmacological agents with distinct mechanisms, such as sleep stabilisation and respiratory stimulation. Some therapies for CSA are associated with improved quality of life, although the evidence on this association is uncertain. Moreover, treatment of CSA with non-invasive positive pressure ventilation is not always effective or safe and may result in a residual apnoea-hypopnoea index., Objectives: To evaluate the benefits and harms of pharmacological treatment compared with active or inactive controls for central sleep apnoea in adults., Search Methods: We used standard, extensive Cochrane search methods. The latest search date was 30 August 2022., Selection Criteria: We included parallel and cross-over randomised controlled trials (RCTs) that evaluated any type of pharmacological agent compared with active controls (e.g. other medications) or passive controls (e.g. placebo, no treatment or usual care) in adults with CSA as defined by the International Classification of Sleep Disorders 3rd Edition. We did not exclude studies based on the duration of intervention or follow-up. We excluded studies focusing on CSA due to periodic breathing at high altitudes., Data Collection and Analysis: We used standard Cochrane methods. Our primary outcomes were central apnoea-hypopnoea index (cAHI), cardiovascular mortality and serious adverse events. Our secondary outcomes were quality of sleep, quality of life, daytime sleepiness, AHI, all-cause mortality, time to life-saving cardiovascular intervention, and non-serious adverse events. We used GRADE to assess certainty of evidence for each outcome., Main Results: We included four cross-over RCTs and one parallel RCT, involving a total of 68 participants. Mean age ranged from 66 to 71.3 years and most participants were men. Four trials recruited people with CSA associated with heart failure, and one study included people with primary CSA. Types of pharmacological agents were acetazolamide (carbonic anhydrase inhibitor), buspirone (anxiolytic), theophylline (methylxanthine derivative) and triazolam (hypnotic), which were given for between three days and one week. Only the study on buspirone reported a formal evaluation of adverse events. These events were rare and mild. No studies reported serious adverse events, quality of sleep, quality of life, all-cause mortality, or time to life-saving cardiovascular intervention. Carbonic anhydrase inhibitors versus inactive control Results were from two studies of acetazolamide versus placebo (n = 12) and acetazolamide versus no acetazolamide (n = 18) for CSA associated with heart failure. One study reported short-term outcomes and the other reported intermediate-term outcomes. We are uncertain whether carbonic anhydrase inhibitors compared to inactive control reduce cAHI in the short term (mean difference (MD) -26.00 events per hour, 95% CI -43.84 to -8.16; 1 study, 12 participants; very low certainty). Similarly, we are uncertain whether carbonic anhydrase inhibitors compared to inactive control reduce AHI in the short term (MD -23.00 events per hour, 95% CI -37.70 to 8.30; 1 study, 12 participants; very low certainty) or in the intermediate term (MD -6.98 events per hour, 95% CI -10.66 to -3.30; 1 study, 18 participants; very low certainty). The effect of carbonic anhydrase inhibitors on cardiovascular mortality in the intermediate term was also uncertain (odds ratio (OR) 0.21, 95% CI 0.02 to 2.48; 1 study, 18 participants; very low certainty). Anxiolytics versus inactive control Results were based on one study of buspirone versus placebo for CSA associated with heart failure (n = 16). The median difference between groups for cAHI was -5.00 events per hour (IQR -8.00 to -0.50), the median difference for AHI was -6.00 events per hour (IQR -8.80 to -1.80), and the median difference on the Epworth Sleepiness Scale for daytime sleepiness was 0 points (IQR -1.0 to 0.00). Methylxanthine derivatives versus inactive control Results were based on one study of theophylline versus placebo for CSA associated with heart failure (n = 15). We are uncertain whether methylxanthine derivatives compared to inactive control reduce cAHI (MD -20.00 events per hour, 95% CI -32.15 to -7.85; 15 participants; very low certainty) or AHI (MD -19.00 events per hour, 95% CI -30.27 to -7.73; 15 participants; very low certainty). Hypnotics versus inactive control Results were based on one trial of triazolam versus placebo for primary CSA (n = 5). Due to very serious methodological limitations and insufficient reporting of outcome measures, we were unable to draw any conclusions regarding the effects of this intervention., Authors' Conclusions: There is insufficient evidence to support the use of pharmacological therapy in the treatment of CSA. Although small studies have reported positive effects of certain agents for CSA associated with heart failure in reducing the number of respiratory events during sleep, we were unable to assess whether this reduction may impact the quality of life of people with CSA, owing to scarce reporting of important clinical outcomes such as sleep quality or subjective impression of daytime sleepiness. Furthermore, the trials mostly had short-term follow-up. There is a need for high-quality trials that evaluate longer-term effects of pharmacological interventions., (Copyright © 2023 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.)
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- 2023
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60. 1,4-Benzodiazepine N-Nitrosoamidines: Useful Intermediates in the Synthesis of Tricyclic Benzodiazepines
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Carlos del Pozo, Javier González, and Santos Fustero
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N-Nitrosoamidines ,4-benzodiazepines ,midazolam ,alprazolam ,triazolam ,Organic chemistry ,QD241-441 - Abstract
1,4-Benzodiazepine N-nitrosoamidines have been used as scaffolds for the preparation of different tricyclic derivatives. Replacement of the N-nitrosoamidine moiety through treatment with the nucleophiles acetylhydrazine, aminoacetaldehyde dimethylacetal and 1-amino-2-propanol, followed by an acid-catalyzed cyclization step, afforded triazolo and imidazobenzodiazepines 1, 6, and 7, respectively, in good yields. When acetylhydrazine is used as a nucleophile, the overall process provides an alternative route to alprazolam (1b) and triazolam (1c), respectively.
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- 2006
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61. Proposed Guideline Revisions for Dental Sedation and General Anesthesia: Why Target the Safest Level of Sedation?
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Dionne, Raymond A.
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DENTAL anesthesia ,GUIDELINES ,MEDICATION safety ,OUTPATIENT medical care ,DRUG dosage ,HYPNOTICS ,TRIAZOLAM - Abstract
Recently proposed revisions to the American Dental Association's Guidelines for the Use of Sedation and General Anesthesia by Dentists, aimed at improving safety in dental offices, differentiate between levels of sedation based on drug-induced changes in physiologic and behavioral states. However, the author of this op-ed is concerned the proposed revisions may have far-reaching and unintended consequences. [ABSTRACT FROM AUTHOR]
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- 2016
62. High-dose green tea polyphenol intake decreases CYP3A expression in a liver-specific manner with increases in blood substrate drug concentrations.
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Ikarashi, Nobutomo, Ogawa, Sosuke, Hirobe, Ryuta, Kusunoki, Yoshiki, Kon, Risako, Ochiai, Wataru, and Sugiyama, Kiyoshi
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GREEN tea , *PLANT polyphenols , *CYTOCHROME P-450 genetics , *FUNCTIONAL foods , *TRIAZOLAM , *PHARMACOKINETICS - Abstract
In recent years, the intake of functional foods containing high-doses of green tea polyphenols (GP) has been increasing. In this study, the long-term safety of high-dose GP was assessed from a pharmacokinetic point of view by focusing on the drug-metabolizing enzyme, cytochrome P450 (CYP). Mice were fed a diet containing 3% GP for 4 weeks, and the CYP expression levels and activity were determined. The GP-treated group showed a significant decrease in the hepatic CYP3A and an increase in the hepatic CYP2C expression compared with the control group. CYP1A, CYP2D, and CYP2E expression were not different between the GP-treated and the control groups. In the small intestine, there were no differences in the CYP3A protein levels between the groups. The increase in the plasma triazolam concentration in the GP-treated group was observed. Although no changes were found in the hepatic CYP3A levels in mice receiving a diet containing 0.1% GP for 4 weeks, a significant decrease was seen in the hepatic CYP3A level in mice receiving a diet containing 3% GP for only 1 week. This study revealed that the intake of a high-dose GP results in a liver-specific decrease in the CYP3A expression level. The results also indicated that the effects of GP on CYP3A were not observed following the intake of a low-dose GP. In the future, caution should be taken in cases when functional foods containing a high-dose GP are concomitantly consumed with a CYP3A substrate drug. [ABSTRACT FROM AUTHOR]
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- 2016
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63. Next-day residual effects of gabapentin, diphenhydramine, and triazolam on simulated driving performance in healthy volunteers: a phase 3, randomized, double-blind, placebo-controlled, crossover trial.
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Kay, Gary G., Schwartz, Howard I., Wingertzahn, Mark A., Jayawardena, Shyamalie, and Rosenberg, Russell P.
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GABAPENTIN , *DIPHENHYDRAMINE , *DROWSINESS , *TRIAZOLAM , *RANDOMIZED controlled trials , *PLACEBOS , *BLIND experiment - Abstract
Objective Next-day residual effects of a nighttime dose of gabapentin 250 mg were evaluated on simulated driving performance in healthy participants in a randomized, placebo-controlled, double-blind, multicenter, four-period crossover study that included diphenhydramine citrate 76 mg and triazolam 0.5 mg. Methods At treatment visits, participants ( n = 59) were dosed at ~23:30, went to bed immediately, and awakened 6.5 h postdose for evaluation. The primary endpoint was the standard deviation of lateral position for the 100-km driving scenario. Additional measures of driving, sleepiness, and cognition were included. Results Study sensitivity was established with triazolam, which demonstrated significant next-day impairment on all driving endpoints, relative to placebo ( p < 0.001). Gabapentin demonstrated noninferiority to placebo on standard deviation of lateral position and speed deviation but not for lane excursions. Diphenhydramine citrate demonstrated significant impairment relative to gabapentin and placebo on speed deviation ( p < 0.05). Other comparisons were either nonsignificant or statistically ineligible per planned, sequential comparisons. Secondary endpoints for sleepiness and cognitive performance were supportive of these conclusions. Conclusions Together, these data suggest that low-dose gabapentin had no appreciable next-day effects on simulated driving performance or cognitive functioning. Copyright © 2016 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
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- 2016
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64. Effect of buffer conditions on CYP2C8-mediated paclitaxel 6 α -hydroxylation and CYP3A4-mediated triazolam α - and 4-hydroxylation by human liver microsomes.
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Kudo, Toshiyuki, Ozaki, Yuya, Kusano, Tomomi, Hotta, Eri, Oya, Yuka, Komatsu, Seina, Goda, Hitomi, and Ito, Kiyomi
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PACLITAXEL , *TRIAZOLAM , *HYDROXYLATION , *LIVER microsomes , *DRUG metabolism - Abstract
1. Buffer conditions inin vitrometabolism studies using human liver microsomes (HLM) have been reported to affect the metabolic activities of several cytochrome P450 (CYP) isozymes in different ways, although there are no reports about the dependence of CYP2C8 activity on buffer conditions. 2. The present study investigated the effect of buffer components (phosphate or Tris-HCl) and their concentration (10–200 mM) on the CYP2C8 and CYP3A4 activities of HLM, using paclitaxel and triazolam, respectively, as marker substrates. 3. TheKm(or S50) andVmaxvalues for both paclitaxel 6α-hydroxylation and triazolam α- and 4-hydroxylation, estimated by fitting analyses based on the Michaelis–Menten or Hill equation, greatly depended on the buffer components and their concentration. 4. The CLintvalues in phosphate buffer were 1.2–3.0-fold (paclitaxel) or 3.1–6.4-fold (triazolam) higher than in Tris-HCl buffer at 50–100 mM. These values also depended on the buffer concentration, with a maximum 2.3-fold difference observed between 50 and 100 mM which are both commonly used in drug metabolism studies. 5. These findings suggest the necessity for optimization of the buffer conditions in the quantitative evaluation of metabolic clearances, such asin vitro–in vivoextrapolation and also estimating the contribution of a particular enzyme in drug metabolism. [ABSTRACT FROM AUTHOR]
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- 2016
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65. Quantification of adverse effects of regular use of triazolam on clinical outcomes for older people with insomnia: a retrospective cohort study.
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Maeda, Toshiki, Babazono, Akira, Nishi, Takumi, and Yasui, Midori
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TRIAZOLAM , *INSOMNIA treatment , *OLDER people , *RETROSPECTIVE studies , *COHORT analysis , *DRUG side effects , *PRESSURE ulcers , *PNEUMONIA , *INSOMNIA , *TRANQUILIZING drugs - Abstract
Objective: Older people are more likely to have insomnia. One of the most prescribed hypnotics in Japan is triazolam. Although some studies showed the possibility of adverse effects of triazolam in older people, there have been few studies investigating these effects in a clinical setting. The aim of this study was to determine whether patients who used triazolam regularly had increased risks of pneumonia, trauma, and pressure ulcers.Methods: The research design was a retrospective cohort study using claim data. The subjects of the study were patients who were insured by Fukuoka Late Stage Elderly Healthcare Insurance. We defined patients who had received triazolam for 180 days or longer during fiscal year 2011 as the triazolam group, and those who had not received any hypnotics during the period as the non-triazolam group. Each patient in the triazolam group was then matched with a unique control from the non-triazolam group according to propensity score. Multivariate conditional logistic regression analyses were used to obtain adjusted odds ratios for pneumonia, trauma, and pressure ulcer in the triazolam group compared with the non-triazolam group.Results: The number of patients in the triazolam and non-triazolam groups in the unmatched cohort was 13,015 and 411,610, respectively. Adjusted odds ratios show that the risks for pneumonia, trauma, and pressure ulcer in the matched cohort increased by approximately 40%, 30%, and slightly less than 30%, respectively (all statistically significant).Conclusions: Regular use of triazolam is a risk factor for pneumonia, trauma, and pressure ulcer in older people. [ABSTRACT FROM AUTHOR]- Published
- 2016
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66. Antagonism of triazolam self-administration in rhesus monkeys responding under a progressive-ratio schedule: In vivo apparent pA2 analysis.
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Fischer, Bradford D., Platt, Donna M., Rallapalli, Sundari K., Namjoshi, Ojas A., Cook, James M., and Rowlett, James K.
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TRIAZOLAM , *DRUG antagonism , *BENZODIAZEPINES , *GABA receptors , *PHARMACOLOGY , *RHESUS monkeys , *ANIMAL experimentation , *CELL receptors , *DOSE-effect relationship in pharmacology , *MIDAZOLAM , *PRIMATES , *REACTION time , *REINFORCEMENT (Psychology) , *SELF medication , *TRANQUILIZING drugs , *GABA modulators , *CHEMICAL inhibitors - Abstract
Background: Conventional benzodiazepines bind non-selectively to GABAA receptors containing α1, α2, α3, and α5 subunits (α1GABAA, α2GABAA, α3GABAA, and α5GABAA receptors, respectively), and the role of these different GABAA receptor subtypes in the reinforcing effects of benzodiazepines has not been characterized fully. We used a pharmacological antagonist approach with available subtype-selective ligands to evaluate the role of GABAA receptor subtypes in the reinforcing effects of the non-selective conventional benzodiazepine, triazolam.Methods: Rhesus monkeys (n=4) were trained under a progressive-ratio schedule of intravenous midazolam delivery and dose-response functions were determined for triazolam, in the absence and presence of flumazenil (non-selective antagonist), βCCT and 3-PBC (α1GABAA-preferring antagonists), and XLi-093 (α5GABAA-selective antagonist).Results: Flumazenil, βCCT and 3-PBC shifted the dose-response functions for triazolam to the right in a surmountable fashion, whereas XLi-093 was ineffective. Schild analyses revealed rank orders of potencies of flumazenil=βCCT>3-PBC. Comparison of potencies between self-administration and previous binding studies with human cloned GABAA receptor subtypes suggested that the potencies for βCCT and 3-PBC were most consistent with binding at α2GABAA and α3GABAA receptors, but not α1GABAA or α5GABAA receptor subtypes.Conclusions: Our findings were not entirely consistent with blockade of α1GABAA receptors and are consistent with the possibility of α2GABAA and/or α3GABAA subtype involvement in antagonism of the reinforcing effects of triazolam. The α5GABAA receptor subtype likely does not play a substantial role in self-administration under these conditions. [ABSTRACT FROM AUTHOR]- Published
- 2016
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67. Rapid determination of benzodiazepines, zolpidem and their metabolites in urine using direct injection liquid chromatography-tandem mass spectrometry.
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Jeong, Yu-Dong, Kim, Min Kyung, Suh, Sung Ill, In, Moon Kyo, Kim, Jin Young, and Paeng, Ki-Jung
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BENZODIAZEPINES , *ZOLPIDEM , *LIQUID chromatography-mass spectrometry , *ANTICONVULSANTS , *DRUG abuse , *DRUG design , *ALPRAZOLAM , *FLURAZEPAM , *FORENSIC toxicology , *LIQUID chromatography , *MASS spectrometry , *PYRIDINE , *TRANQUILIZING drugs , *TRIAZOLAM - Abstract
Benzodiazepines and zolpidem are generally prescribed as sedative, hypnotics, anxiolytics or anticonvulsants. These drugs, however, are frequently misused in drug-facilitated crime. Therefore, a rapid and simple liquid chromatography-tandem mass spectrometric (LC-MS/MS) method was developed for identification and quantification of benzodiazepines, zolpidem and their metabolites in urine using deuterium labeled internal standards (IS). Urine samples (120 μL) mixed with 80 μL of the IS solution were centrifuged. An aliquot (5 μL) of the sample solution was directly injected into the LC-MS/MS system for analysis. The mobile phases consisted of water and acetonitrile containing 2mM ammonium trifluoroacetate and 0.2% acetic acid. The analytical column was a Zorbax SB-C18 (100 mm × 2.1 mm i.d., 3.5 μm, Agilent). The separation and detection of 18 analytes were achieved within 10 min. Calibration curves were linear over the concentration ranges of 0.5-20 ng/mL (zolpidem), 1.0-40 ng/mL (flurazepam and temazepam), 2.5-100 ng/mL (7-aminoclonazepam, 1-hydroxymidazolam, midazolam, flunitrazepam and alprazolam), 5.0-200 ng/mL (zolpidem phenyl-4-carboxylic acid, α-hydroxyalprazolam, oxazepam, nordiazepam, triazolam, diazepam and α-hydroxytriazolam), 10-400 ng/mL (lorazepam and desalkylflurazepam) and 10-100 ng/mL (N-desmethylflunitrazepam) with the coefficients of determination (r(2)) above 0.9971. The dilution integrity of the analytes was examined for supplementation of short linear range. Dilution precision and accuracy were tested using two, four and ten-folds dilutions and they ranged from 3.7 to 14.4% and -12.8 to 12.5%, respectively. The process efficiency for this method was 63.0-104.6%. Intra- and inter-day precisions were less than 11.8% and 9.1%, while intra- and inter-day accuracies were less than -10.0 to 8.2%, respectively. The lower limits of quantification were lower than 10 ng/mL for each analyte. The applicability of the developed method was successfully verified with human urine samples from drug users (n=21). Direct urine sample injection and optimized mobile phases were introduced for simple sample preparation and high-sensitivity with the desired separation. [ABSTRACT FROM AUTHOR]
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- 2015
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68. Residual effects of zolpidem, triazolam, rilmazafone and placebo in healthy elderly subjects: a randomized double-blind study.
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Uemura, Sachiko Ito, Kanbayashi, Takashi, Wakasa, Masahiko, Satake, Masahiro, Ito, Wakako, Shimizu, Kazumi, Shioya, Takanobu, Shimizu, Tetsuo, and Nishino, Seiji
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ZOLPIDEM , *DRUG efficacy , *COGNITIVE ability , *PSYCHOLOGY of movement , *HEALTH of older people , *DRUG dosage , *BLIND experiment , *THERAPEUTICS , *COMPARATIVE studies , *CROSSOVER trials , *HETEROCYCLIC compounds , *RESEARCH methodology , *MEDICAL cooperation , *PYRIDINE , *RESEARCH , *TRIAZOLAM , *EVALUATION research , *RANDOMIZED controlled trials , *HUMAN research subjects , *PHARMACODYNAMICS - Abstract
With current hypnotic agents, next-day residual effects are a common problem. The purpose of the present study was to evaluate the residual effects of the commercially available hypnotics - zolpidem, triazolam, and rilmazafone - on the physical and cognitive functions of healthy elderly people in the early morning and the day following drug administration. In this study, the next-day residual effects of zolpidem, triazolam, and rilmazafone, following bedtime dosing in elderly subjects, were evaluated. Women (n = 11) and men (n = 2) aged 60-70 years received a single dose (at 23:00) of one of these, zolpidem 5 mg, triazolam 0.125 mg, rilmazafone 1 mg and placebo in a randomized, double-blind, crossover design. Measures of objective parameters and psychomotor performances (Timed up and Go test, Functional Reach Test, body sway test, critical flicker fusion test, simple discrimination reaction test, short-term memory test) and subjective ratings were obtained at 04:00, 07:00, and the next time of the day. All hypnotics were generally well tolerated; there were no serious adverse side effects and no subjects discontinued the evaluations. Compared to placebo, zolpidem and rilmazafone had good results on the Functional Reach Test. Although subjective assessments tended to be poor in the early morning, rilmazafone significantly improved the body sway test in the other hypnotics. A single dose of zolpidem 5 mg and triazolam 0.125 mg did not have any next-day residual effects on healthy elderly subjects. Residual effects appeared to be related to the compound's half-life and the dose used. Rilmazafone 1 mg exhibited steadiness in static and dynamic balance and seemed to be more favorable for the elderly with early morning awakening. [ABSTRACT FROM AUTHOR]
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- 2015
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69. Leveraging Human Plasma-Derived Small Extracellular Vesicles as Liquid Biopsy to Study the Induction of Cytochrome P450 3A4 by Modafinil
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Andrew Rowland, Linda S. Wood, Manoli Vourvahis, and A. David Rodrigues
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Proteomics ,medicine.medical_specialty ,Triazolam ,Time Factors ,Modafinil ,Models, Biological ,Drug Administration Schedule ,Extracellular Vesicles ,Plasma ,Internal medicine ,medicine ,Cytochrome P-450 CYP3A ,Humans ,Pharmacology (medical) ,Drug Interactions ,CYP3A5 ,Pharmacology ,CYP3A4 ,biology ,Chemistry ,Liquid Biopsy ,Cytochrome P450 ,Cytochrome P-450 CYP3A Inducers ,Dextromethorphan ,Healthy Volunteers ,Hydroxycholesterols ,Endocrinology ,Liver ,Enzyme Induction ,biology.protein ,Midazolam ,Rifampin ,Rifampicin ,Biomarkers ,medicine.drug - Abstract
Preparations of plasma-derived small extracellular vesicles (sEVs) were deployed as liquid biopsy to study cytochrome P450 (CYP) 3A4 (CYP3A4) induction following modafinil 400 mg once daily × 14 days (young healthy volunteers, N = 10 subjects). Induction was confirmed using the 4β-hydroxycholesterol-to-cholesterol (4βHC/C) ratio, a plasma CYP3A4/5 biomarker, with a mean 2.1-fold increase (Day 15 vs. Day 1; 90% confidence interval (CI) = 1.8-2.3; P value = 0.0004). Proteomic analysis revealed the induction (mean Day 15 vs. Day 1 fold-increase (90% CI)) of both liver (1.3 (1.1-1.5), P value = 0.014) and nonliver (1.9 (1.6-2.2), P value = 0.04) sEV CYP3A4 protein expression. In CYP3A5 nonexpresser subjects, the baseline (pre-dose) 4βHC/C plasma ratio was more highly correlated with liver sEVs (r = 0.937, P value = 0.001) than nonliver sEVs (r = 0.619, P value = 0.101) CYP3A4 protein expression. When CYP3A5 expressers (CYP3A5*1/*3) were included, the correlation with liver sEVs (r = 0.761, P value = 0.011) and nonliver sEVs (r = 0.391, P value = 0.264) CYP3A4 protein was weaker. Although modafinil-induced changes in plasma 4βHC/C ratio did not correlate with sEVs CYP3A4 protein expression, the individual subject sEVs proteomic data were used successfully to predict victim drug (midazolam, triazolam, dextromethorphan, 17α-ethinylestradiol, and abemaciclib) area under the plasma concentration-time curve (AUC) ratios (AUCRs) following modafinil. Based on the AUCR values, modafinil was classified as a weak to moderate CYP3A4 inducer (vs. rifampicin). For the first time, it was possible to deploy plasma-derived sEVs to study CYP3A4 induction beyond rifampicin, a more potent CYP3A4 inducer.
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- 2021
70. Triazolam
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Stolerman, Ian P., editor and Price, Lawrence H., editor
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- 2015
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71. Prediction of Drug–Drug Interactions Between Opioids and Overdosed Benzodiazepines Using Physiologically Based Pharmacokinetic (PBPK) Modeling and Simulation
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Beihong Ji, Shuhan Liu, Junmei Wang, Xiang-Qun Xie, Ying Xue, Xibing He, and Viet Hoang Man
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Drug ,Physiologically based pharmacokinetic modelling ,Triazolam ,media_common.quotation_subject ,Pharmacology ,030226 pharmacology & pharmacy ,Models, Biological ,03 medical and health sciences ,Benzodiazepines ,0302 clinical medicine ,Pharmacokinetics ,Cytochrome P-450 Enzyme System ,medicine ,Humans ,Computer Simulation ,Drug Interactions ,Original Research Article ,media_common ,030203 arthritis & rheumatology ,business.industry ,lcsh:RM1-950 ,3. Good health ,Analgesics, Opioid ,lcsh:Therapeutics. Pharmacology ,Alprazolam ,Pharmacodynamics ,business ,Oxycodone ,medicine.drug ,Buprenorphine - Abstract
Background Researchers have long been interested in the potential drug–drug interactions (DDIs) between opioids and benzodiazepines. However, much remains unknown concerning the interactions between these two drug classes. The objective of this work is to study the mechanism underlying the DDIs between opioids and benzodiazepines from the perspective of their pharmacokinetic (PK) interactions. A PK interaction occurs when two drugs are metabolized by the same cytochrome P450 enzymes and is one of the most common reasons for DDIs. Methods We quantitatively predicted the DDIs between three opioids (fentanyl, oxycodone and buprenorphine) and four benzodiazepines (alprazolam, diazepam, midazolam and triazolam) using a physiologically based pharmacokinetic (PBPK) modeling approach. A set of PBPK models was first constructed for these common opioids and benzodiazepines using SimCYP software, and the DDIs between them were then explored at various dosages. Results Our simulation results suggested there were no PK interactions between normal doses of opioids and benzodiazepines; but weak interactions can be expected with the combination of opioids and overdosed benzodiazepines. Particular attention should be given to the combination of fentanyl and overdosed alprazolam since a PK interaction can be observed between them. Conclusion Our results appear to indicate that pharmacodynamics may play a more important role than PKs in causing DDIs between opioids and benzodiazepines. This study also demonstrated that molecular modeling can be a very useful tool to mitigate the problem of “missing metabolic reaction parameters” in PK modeling and simulation. Electronic supplementary material The online version of this article (10.1007/s40268-019-00282-3) contains supplementary material, which is available to authorized users.
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- 2019
72. GABA A Receptor Subtypes and the Abuse‐Related Effects of Ethanol in Rhesus Monkeys: Experiments with Selective Positive Allosteric Modulators
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James K. Rowlett, Donna M. Platt, Laís F. Berro, Jemma E Cook, Guanguan Li, Daniela Rüedi-Bettschen, Rajwana Jahan, Lalit K. Golani, James M. Cook, and Farjana Rashid
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endocrine system ,Zolpidem ,Triazolam ,Chemistry ,GABAA receptor ,Allosteric regulation ,030508 substance abuse ,Medicine (miscellaneous) ,Alpha (ethology) ,Pharmacology ,Toxicology ,03 medical and health sciences ,Psychiatry and Mental health ,0302 clinical medicine ,mental disorders ,medicine ,Functional selectivity ,0305 other medical science ,Self-administration ,Receptor ,reproductive and urinary physiology ,030217 neurology & neurosurgery ,medicine.drug - Abstract
Background Previous studies have investigated α1GABAA and α5GABAA receptor mechanisms in the behavioral effects of ethanol (EtOH) in monkeys. However, genetic studies in humans and preclinical studies with mutant mice suggest a role for α2GABAA and/or α3GABAA receptors in the effects of EtOH. The development of novel positive allosteric modulators (PAMs) with functional selectivity (i.e., selective efficacy) at α2GABAA and α3GABAA receptors allows for probing of these subtypes in preclinical models of the discriminative stimulus and reinforcing effects of EtOH in rhesus macaques. Methods In discrimination studies, subjects were trained to discriminate EtOH (2 g/kg, intragastrically) from water under a fixed-ratio (FR) schedule of food delivery. In oral self-administration studies, subjects were trained to self-administer EtOH (2% w/v) or sucrose (0.3 to 1% w/v) under an FR schedule of solution availability. Results In discrimination studies, functionally selective PAMs at α2GABAA and α3GABAA (HZ-166) or α3GABAA (YT-III-31) receptors substituted fully (maximum percentage of EtOH-lever responding ≥80%) for the discriminative stimulus effects of EtOH without altering response rates. Full substitution for EtOH also was engendered by a nonselective PAM (triazolam), an α5GABAA -preferring PAM (QH-ii-066) and a PAM at α2GABAA , α3GABAA , and α5GABAA receptors (L-838417). A partial (MRK-696) or an α1GABAA -preferring (zolpidem) PAM only engendered partial substitution (i.e., ~50 to 60% EtOH-lever responding). In self-administration studies, pretreatments with the functionally selective PAMs at α2GABAA and α3GABAA (XHe-II-053 and HZ-166) or α3GABAA (YT-III-31 and YT-III-271) receptors increased EtOH, but not sucrose, drinking at doses that had few, or no, observable sedative-motor effects. Conclusions Our results confirm prior findings regarding the respective roles of α1GABAA and α5GABAA receptors in the discriminative stimulus effects of EtOH and, further, suggest a key facilitatory role for α3GABAA and potentially α2GABAA receptors in several abuse-related effects of EtOH in monkeys. Moreover, they reveal a potential role for these latter subtypes in EtOH's sedative effects.
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- 2019
73. Application of unbound liver-to-plasma concentration ratio to quantitative projection of cytochrome P450-mediated drug–drug interactions using physiologically based pharmacokinetic modelling approach
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Shinji Iwasaki, Atsutoshi Furuta, Mai Kosaka, Miyuki Funami, Sayaka Nakagawa, Noriyasu Sano, Yohei Kosugi, Andy Z. X. Zhu, Hideki Hirabayashi, and Nobuyuki Amano
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Male ,Drug ,Physiologically based pharmacokinetic modelling ,Erythrocytes ,Health, Toxicology and Mutagenesis ,media_common.quotation_subject ,Drug-drug interaction ,Toxicology ,Models, Biological ,030226 pharmacology & pharmacy ,Biochemistry ,Rats, Sprague-Dawley ,03 medical and health sciences ,0302 clinical medicine ,Cytochrome P-450 Enzyme System ,Pharmacokinetics ,Animals ,Humans ,Drug Interactions ,heterocyclic compounds ,Projection (set theory) ,media_common ,Pharmacology ,biology ,Chemistry ,Cytochrome P450 ,Triazolam ,General Medicine ,Liver ,Area Under Curve ,030220 oncology & carcinogenesis ,Plasma concentration ,Biophysics ,biology.protein ,Itraconazole ,Software - Abstract
1. This study evaluated the prediction accuracy of cytochrome P450 (CYP)-mediated drug-drug interaction (DDI) using minimal physiologically-based pharmacokinetic (PBPK) modelling incorporating the hepatic accumulation factor of an inhibitor (i.e. unbound liver/unbound plasma concentration ratio [Kp,uu,liver]) based on 22 clinical DDI studies. 2. Kp,uu,liver values were estimated using three methods: (1) ratio of cell-to-medium ratio in human cryopreserved hepatocytes (C/Mu) at 37 °C to that on ice (Kp,uu,C/M), (2) multiplication of total liver/unbound plasma concentration ratio (Kp,u,liver) estimated from C/Mu at 37 °C with unbound fraction in human liver homogenate (Kp,uu,cell) and (3) observed Kp,uu,liver in rats after intravenous infusion (Kp,uu,rat). 3. PBPK model using each Kp,uu,liver projected the area under the curve (AUC) increase of substrates more accurately than the model assuming a Kp,uu,liver of 1 for the average fold error and root mean square error did. Particularly, the model with a Kp,uu,liver of 1 underestimated the AUC increase of triazolam following co-administration with CYP3A4 inhibitor itraconazole by five-fold, whereas the AUC increase projected using the model incorporating the Kp,uu,C/M, Kp,uu,cell, or Kp,uu,rat of itraconazole and hydroxyitraconazole was within approximately two-fold of the actual value. 4. The results indicated that incorporating Kp,uu,liver into the PBPK model improved the accuracy of DDI projection.
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- 2019
74. 8-Substituted Triazolobenzodiazepines: In Vitro and In Vivo Pharmacology in Relation to Structural Docking at the α1 Subunit-Containing GABAA Receptor
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Lalit K. Golani, Donna M. Platt, Daniela Rüedi-Bettschen, Chitra Edwanker, Shenming Huang, Michael M. Poe, Roman Furtmüller, Werner Sieghart, James M. Cook, and James K. Rowlett
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0301 basic medicine ,Triazolam ,medicine.drug_class ,rhesus monkey ,RM1-950 ,Pharmacology ,Anxiolytic ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,In vivo ,squirrel monkey ,medicine ,Potency ,Pharmacology (medical) ,Benzodiazepine ,GABAA receptor ,030104 developmental biology ,Diazepine ,chemistry ,sedation ,Docking (molecular) ,Therapeutics. Pharmacology ,benzodiazepine ,030217 neurology & neurosurgery ,anxiolytic ,medicine.drug - Abstract
In order to develop improved anxiolytic drugs, 8-substituted analogs of triazolam were synthesized in an effort to discover compounds with selectivity for α2/α3 subunit-containing GABAA subtypes. Two compounds in this series, XLi-JY-DMH (6-(2-chlorophenyl)-8-ethynyl-1-methyl-4H-benzo [f][1,2,4]triazolo[4,3-a][1,4]diazepine) and SH-TRI-108 [(E)-8-ethynyl-1-methyl-6-(pyridin-2-yl)-4H-benzo [f][1,2,4]triazolo[4,3-a][1,4]diazepine], were evaluated for in vitro and in vivo properties associated with GABAA subtype-selective ligands. In radioligand binding assays conducted in transfected HEK cells containing rat αXβ3γ2 subtypes (X = 1,2,3,5), no evidence of selectivity was obtained, although differences in potency relative to triazolam were observed overall (triazolam > XLi-JY-DMH > SH-TRI-108). In studies with rat αXβ3γ2 subtypes (X = 1,2,3,5) using patch-clamp electrophysiology, no differences in maximal potentiation of GABA-mediated Cl− current was obtained across subtypes for any compound. However, SH-TRI-108 demonstrated a 25-fold difference in functional potency between α1β3γ2 vs. α2β3γ2 subtypes. We evaluated the extent to which this potency difference translated into behavioral pharmacological differences in monkeys. In a rhesus monkey conflict model of anxiolytic-like effects, triazolam, XLi-JY-DMH, and SH-TR-108 increased rates of responding attenuated by shock (anti-conflict effect) but also attenuated non-suppressed responding. In a squirrel monkey observation procedure, both analogs engendered a profile of sedative-motor effects similar to that reported previously for triazolam. In molecular docking studies, we found that the interactions of the 8-ethynyl triazolobenzodiazepines with the C-loop of the α1GABAA site was stronger than that of imidazodiazepines XHe-II-053 and HZ-166, which may account for the non-sedating yet anxiolytic profile of these latter compounds when evaluated in previous studies.
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- 2021
75. Elucidation of Degradation Behavior of Nitrazepam and Other Benzodiazepines in Artificial Gastric Juice: Study on Degradability of Drugs in Stomach (II)
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Rie Ito, Sachi Saito, Mai Yokota, and Koichi Saito
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Triazolam ,Nitrazepam ,Chemical kinetics ,Benzodiazepines ,Benzophenones ,Reaction rate constant ,Drug Stability ,Tandem Mass Spectrometry ,Drug Discovery ,medicine ,Humans ,Chromatography, High Pressure Liquid ,Bromazepam ,Chromatography ,Gastric Juice ,Chemistry ,Hydrolysis ,Stomach ,General Chemistry ,General Medicine ,Arrhenius plot ,Pharmaceutical Preparations ,Etizolam ,Flunitrazepam ,Acids ,medicine.drug - Abstract
The degradation behavior of eight benzodiazepines (BZPs): alprazolam, etizolam, diazepam, triazolam, nitrazepam (NZP), flunitrazepam (FNZ), bromazepam, and lorazepam, in artificial gastric juice was monitored by a LC/photodiode array detector (PDA) to estimate their pharmacokinetics in the stomach. For drugs that were degradable, such physicochemical parameters as reaction rate constant were measured to evaluate the effect of storage conditions on drug degradability, such as whether the degradation proceeds faster by increasing storage temperature, or whether the degradation reaction is reversible by adjusting pH. As a result, it was confirmed that although the eight BZPs degraded in artificial gastric juice, most of them could be restored when pH was increased, and the restoration rates differed depending on the pH and the type of BZP. As for NZP, an Arrhenius plot was drawn to obtain the physicochemical parameters, such as activation energy and activation entropy involved in the degradation reaction, and the reaction kinetics was discussed. In addition, two substances were confirmed as the degradation products of NZP in artificial gastric juice: one was a reversible degradation product (A) (intermediate) and the other was an irreversible degradation product (B) (final degradation product). The intermediate was identified as 2-amino-N-(2-benzoyl-4-nitrophenyl)-acetamide, and the final degradation product was 2-amino-5-nitrobenzophenone. Therefore, when detecting NZP in human stomach contents, such as during judicial dissection, it would be prudent to target NZP as well as the intermediate (A) and the final degradation product (B).
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- 2021
76. Investigating the Utility of Humanized Pregnane X Receptor-Constitutive Androstane Receptor-CYP3A4/7 Mouse Model to Assess CYP3A-Mediated Induction
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Justin Q, Ly, Susan, Wong, Liling, Liu, Ruina, Li, Kirsten, Messick, and Jae H, Chang
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Cyclopropanes ,Pioglitazone ,Drug Evaluation, Preclinical ,Pregnane X Receptor ,Cytochrome P-450 CYP3A Inducers ,Mice, Transgenic ,Triazolam ,Benzoxazines ,Mice ,Species Specificity ,Alkynes ,Microsomes, Liver ,Animals ,Cytochrome P-450 CYP3A ,Feasibility Studies ,Humans ,Drug Interactions ,Female ,Rifampin ,Constitutive Androstane Receptor - Abstract
Clinical induction liability is assessed with human hepatocytes. However, underpredictions in the magnitude of clinical induction have been reported. Unfortunately, in vivo studies in animals do not provide additional insight because of species differences in drug metabolizing enzymes and their regulatory pathways. To circumvent this limitation, transgenic animals expressing human orthologs were developed. The aim of this work was to investigate the utility of mouse models expressing human orthologs of pregnane X receptor, constitutive androstane receptor, and CYP3A4/7 (Tg-Composite) in evaluating clinical induction. Rifampin, efavirenz, and pioglitazone, which were employed to represent strong, moderate, and weak inducers, were administered at multiple doses to Tg-Composite animals. In vivo CYP3A activity was monitored by measuring changes in the exposure of the CYP3A probe substrate triazolam. After the in vivo studies, microsomes were prepared from their livers to measure changes of in vitro CYP3A4 activity. In both in vivo and in vitro, distinction of clinic induction was recapitulated as rifampin yielded the greatest inductive effect followed by efavirenz and pioglitazone. Interestingly, with rifampin, in vivo CYP3A activity was approximately 4-fold higher than in vitro activity. Conversely, there was no difference between in vivo and in vitro CYP3A activity with efavirenz. These findings are consistent with the report that, although rifampin exhibits differential inductive effects between the intestines and liver, efavirenz does not. These data highlight the promise of transgenic models, such as Tg-Composite, to complement human hepatocytes to enhance the translatability of clinical induction as well as become a powerful tool to further study mechanisms of drug disposition. SIGNIFICANCE STATEMENT: Underprediction of the magnitude of clinical induction when using human hepatocytes has been reported, and transgenic models may improve clinical translatability. The work presented here showcases the human orthologs of pregnane X receptor, constitutive androstane receptor, and CYP3A4/7 model, which was able to recapitulate the magnitude of clinical induction and to differentiate tissue-dependent induction observed with rifampin but not with efavirenz. These results not only foreshadow the potential application of such transgenic models in assessing clinical induction but also in further investigation of the mechanism of drug disposition.
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- 2021
77. Relative contributions of metabolic enzymes to systemic elimination can be estimated from clinical DDI studies: Validation using an in silico approach
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Ayuko Imaoka, Takeshi Akiyoshi, Kana Koinuma, Toshiaki Tsuchitani, and Hisakazu Ohtani
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Pharmacology ,education.field_of_study ,Triazolam ,CYP3A4 ,Chemistry ,Population ,Area under the curve ,Repaglinide ,Ketoconazole ,Pharmacokinetics ,Area Under Curve ,medicine ,Cytochrome P-450 CYP3A ,Cytochrome P-450 CYP3A Inhibitors ,Humans ,Pharmacology (medical) ,Computer Simulation ,Drug Interactions ,education ,Omeprazole ,medicine.drug - Abstract
OBJECTIVE The contribution ratios (CR) of metabolic enzymes to the systemic clearance of a drug can be estimated from in vitro studies. Another feasible approach is to calculate them based on the increase in the area under the time-concentration curve (AUC) caused by the co-administration of a potent and selective inhibitor in a clinical drug-drug interaction (DDI) study. However, some factors, such as the inhibitory potency of the inhibitor and the inhibition of first-pass metabolism, might affect the estimation of CR based on clinical DDI studies. We aimed to validate the accuracy of the DDI-based estimation of CR using an in silico approach. MATERIALS AND METHODS An in silico DDI study was conducted using a population-based physiological pharmacokinetic simulator to estimate the CR of cytochrome P450 (CYP)3A4 for zolpidem, sildenafil, omeprazole, triazolam, and repaglinide. The ratio of the AUC value seen in the presence of an inhibitor (ketoconazole or itraconazole) to that observed in the absence of the inhibitor (AUC ratio) was also calculated. The CR for CYP3A4 obtained using the simulator (CRdef) were compared with those calculated from the AUC ratio (CRest). RESULTS When ketoconazole was used, good correlations between the CRest and CRdef were obtained for all examined substrates (inconsistencies were seen in < 10% of subjects). CR estimates derived from the AUC ratio were found to be accurate. Some underestimation was observed, possibly due to incomplete inhibition, and some overestimation caused by extensive first-pass metabolism was noted. CONCLUSION This study verified that CR obtained from AUC ratios in DDI studies are quite reliable.
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- 2021
78. Expanded table: Some oral drugs for chronic insomnia.
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- Humans, Hypnotics and Sedatives adverse effects, Sleep Initiation and Maintenance Disorders drug therapy
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- 2023
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79. Drugs for chronic insomnia.
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- Humans, Hypnotics and Sedatives adverse effects, Sleep Initiation and Maintenance Disorders diagnosis, Sleep Initiation and Maintenance Disorders drug therapy
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- 2023
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80. A Focus on Triazolium as a Multipurpose Molecular Station for pH-Sensitive Interlocked Crown-Ether-Based Molecular Machines.
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Coutrot, Frédéric
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TRIAZOLAM , *MOLECULAR machinery (Technology) , *ETHER (Space) , *HYDROGEN-ion concentration , *MOLECULAR interactions - Abstract
The control of motion of one element with respect to others in an interlocked architecture allows for different co-conformational states of a molecule. This can result in variations of physical or chemical properties. The increase of knowledge in the field of molecular interactions led to the design, the synthesis, and the study of various systems of molecular machinery in a wide range of interlocked architectures. In this field, the discovery of new molecular stations for macrocycles is an attractive way to conceive original molecular machines. In the very recent past, the triazolium moiety proved to interact with crown ethers in interlocked molecules, so that it could be used as an ideal molecular station. It also served as a molecular barrier in order to lock interlaced structures or to compartmentalize interlocked molecular machines. This review describes the recently reported examples of pH-sensitive triazolium-containing molecular machines and their peculiar features. [ABSTRACT FROM AUTHOR]
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- 2015
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81. The effects of acute treatment with ramelteon, triazolam, and placebo on driving performance, cognitive function, and equilibrium function in healthy volunteers.
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Miyata, Akemi, Iwamoto, Kunihiro, Kawano, Naoko, Kohmura, Kunihiro, Yamamoto, Maeri, Aleksic, Branko, Ebe, Kazutoshi, Noda, Akiko, Noda, Yukihiro, Iritani, Shuji, and Ozaki, Norio
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TRIAZOLAM , *PLACEBOS , *COGNITIVE ability , *VOLUNTEERS' health ,PHYSIOLOGICAL effects of hypnotics - Abstract
Rationale: Hypnotics are widely used to treat insomnia but adverse effects of different hypnotics, especially benzodiazepine receptor agonists, are getting more attention lately. The effects of novel hypnotics have not been fully examined. Objective: This study aims to assess the effects of two hypnotics, ramelteon and triazolam, on driving performance, cognitive function, and equilibrium function. Methods: In this double-blinded, three-way crossover trial, 17 healthy males received acute doses of 8 mg ramelteon, 0.125 mg triazolam, and placebo. The subjects were administered three driving tasks-road-tracking, car-following, and harsh-braking-using a driving simulator and three cognitive tasks-Continuous Performance Test, N-back Test, and Trail-Making Test-at baseline and at 1 and 4 h post-dosing. The Stanford Sleepiness Scale scores and computerized posturography were also assessed. Results: In the driving simulations, ramelteon and triazolam increased the number of subjects who slid off the road. Triazolam increased the standard deviation of lateral position compared to ramelteon and placebo at 1 h post-dosing. Ramelteon and triazolam significantly increased the time to complete of Trail-Making Test part A and the environmental area in posturography compared to placebo at 1 and 4 h post-dosing. Ramelteon and triazolam significantly increased subjective sleepiness compared to placebo at 1 h post-dosing. Conclusions: Ramelteon may affect road-tracking performance, visual attention and/or psychomotor speed measured by Trail-Making Test part A, and body balance in acute dosing. Lower dose of triazolam also impaired performance worse than ramelteon. Physicians should consider risks and benefits when prescribing both drugs, especially in the initial period of administration. [ABSTRACT FROM AUTHOR]
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- 2015
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82. In vivo evaluation of intestinal human CYP3A inhibition by macrolide antibiotics in CYP3A-humanised mice
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Hidetaka Akita, Kaoru Kobayashi, Genki Minegishi, Yasuhiro Kazuki, Atsushi Miyajima, and Shin-Ichiro Nitta
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Pharmacology ,Cytochrome P450 3A ,Triazolam ,Chemistry ,medicine.drug_class ,CYP3A ,Health, Toxicology and Mutagenesis ,General Medicine ,Toxicology ,030226 pharmacology & pharmacy ,Biochemistry ,Bioavailability ,Macrolide Antibiotics ,03 medical and health sciences ,0302 clinical medicine ,In vivo ,030220 oncology & carcinogenesis ,medicine ,Intestinal Metabolism ,A determinant ,medicine.drug - Abstract
It is important to predict drug-drug interactions via inhibition of intestinal cytochrome P450 3A (CYP3A) which is a determinant of bioavailability of orally administered CYP3A substrates. However, inhibitory effects of macrolide antibiotics on CYP3A-mediated metabolism are not entirely identical between humans and rodents.We investigated the effects of macrolide antibiotics, clarithromycin and erythromycin, on in vitro and in vivo metabolism of triazolam, a CYP3A substrate, in CYP3A-humanised mice generated by using a mouse artificial chromosome vector carrying a human CYP3A gene.Metabolic activities of triazolam were inhibited by macrolide antibiotics in liver and intestine microsomes of CYP3A-humanised mice.The area under the plasma concentration-time curve ratios of 4-hydroxytriazolam to triazolam after oral dosing of triazolam were significantly decreased by multiple administration of macrolide antibiotics. The plasma concentrations ratios of α-hydroxytriazolam and 4-hydroxytriazolam to triazolam in portal blood were significantly decreased by multiple administration of clarithromycin in CYP3A-humanised mice.These results suggest that intestinal CYP3A activity was inhibited by macrolide antibiotics in CYP3A-humanised mice in vitro and in vivo. The plasma concentrations of triazolam and its metabolites in the portal blood of CYP3A-humanised mice would be useful for direct evaluation of intestinal CYP3A-mediated drug-drug interactions. It is important to predict drug-drug interactions via inhibition of intestinal cytochrome P450 3A (CYP3A) which is a determinant of bioavailability of orally administered CYP3A substrates. However, inhibitory effects of macrolide antibiotics on CYP3A-mediated metabolism are not entirely identical between humans and rodents. We investigated the effects of macrolide antibiotics, clarithromycin and erythromycin, on in vitro and in vivo metabolism of triazolam, a CYP3A substrate, in CYP3A-humanised mice generated by using a mouse artificial chromosome vector carrying a human CYP3A gene. Metabolic activities of triazolam were inhibited by macrolide antibiotics in liver and intestine microsomes of CYP3A-humanised mice. The area under the plasma concentration-time curve ratios of 4-hydroxytriazolam to triazolam after oral dosing of triazolam were significantly decreased by multiple administration of macrolide antibiotics. The plasma concentrations ratios of α-hydroxytriazolam and 4-hydroxytriazolam to triazolam in portal blood were significantly decreased by multiple administration of clarithromycin in CYP3A-humanised mice. These results suggest that intestinal CYP3A activity was inhibited by macrolide antibiotics in CYP3A-humanised mice in vitro and in vivo. The plasma concentrations of triazolam and its metabolites in the portal blood of CYP3A-humanised mice would be useful for direct evaluation of intestinal CYP3A-mediated drug-drug interactions.
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- 2021
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83. Triazolam
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Courtney, John C., Akins, Cristy, Kreutzer, Jeffrey S., editor, DeLuca, John, editor, and Caplan, Bruce, editor
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- 2011
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84. Comparative efficacy and safety of hypnotics for insomnia in older adults: a systematic review and network meta-analysis
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Pei Shan Tsai, Pin-Yuan Chen, Yu-Kang Tu, Hsin Chien Lee, Hsiao-Yean Chiu, Shi-Jun Hua, and Jen-Wei Liu
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medicine.medical_specialty ,Triazolam ,medicine.drug_class ,Network Meta-Analysis ,Polysomnography ,Placebo ,law.invention ,Hypnotic ,03 medical and health sciences ,Zaleplon ,0302 clinical medicine ,Randomized controlled trial ,law ,Sleep Initiation and Maintenance Disorders ,Physiology (medical) ,medicine ,Insomnia ,Humans ,Hypnotics and Sedatives ,030212 general & internal medicine ,Eszopiclone ,Aged ,medicine.diagnostic_test ,business.industry ,Doxepin ,Meta-analysis ,Physical therapy ,Neurology (clinical) ,Sleep onset latency ,Sleep onset ,medicine.symptom ,Sleep ,business ,030217 neurology & neurosurgery ,medicine.drug - Abstract
Background: Hypnotics, such as benzodiazepines and nonbenzodiazepines, have been used to aid sleep and treat insomnia in older adults. However, there is limited information for the comparative efficacy and safety of different hypnotics for insomnia in older adults. Methods: EMBASE, PubMed, ClinicalTrials.gov, and ProQuest Dissertations and Theses A&I databases were searched. We included randomised controlled trials comparing hypnotics with either another hypnotic or placebo for insomnia treatment in elderly people. A multivariate random effect network meta-analysis in a frequentist framework was used for estimations of treatment effects and safety. Findings: Twenty-two articles with 5172 older adults were included. Eszopiclone was ranked as the best therapy for prolonging objective total sleep time (28·60 mins), and low-dose doxepin appeared to be the optimal treatment for increasing subjective total sleep time (28·19 mins) and objective sleep efficiency (6.8%) compared with control. Zaleplon was the most effective therapy in reducing objective and subjective sleep onset latency (-21·63 mins and -15·92 mins) compared with control. The risk of overall adverse events was highest with triazolam use (odd ratio, 1·89, 95% confidence interval 1·10 to 3·25) compared to placebo. Interpretation: Considering unclear risk of bias and the potential adverse effects of benzodiazepines and nonbenzodiazepines, we suggest that low-dose doxepin can be the optimal pharmacotherapy for the improvements of sleep duration and sleep efficiency. Future RCTs investigating the treatment effects of hypnotics, particularly low-dose doxepin, on insomnia in older adults are warranted. Funding Statement: HYC acknowledges the support of the Taiwan Ministry of Science and Technology (MOST 106-2314-B-038 -058 -MY3). YKT was supported by the Ministry of Science and Technology, Taiwan (MOST 106-2314-B-002 -098 -MY3). Declaration of Interests: All authors declared no conflicts of interest in this work. Ethics Approval Statement: The study is registered with PROSPERO, number CRD42016046301.
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- 2020
85. Triazolam, obesity and non cardiac pulmonary edema
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Fabio Di Stefano, Salvatore Nicolai, and Filippo Salvati
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Non cardiac pulmonary edema ,Adverse drug reaction ,Triazolam ,Obesity ,Medicine - Abstract
Introduction Triazolam belongs to the group of benzodiazepines and may have side effects on the respiratory system which include not only respiratory depression, but also transient benign non cardiac pulmonary edema.Case report A 52 year old obese woman developed pulmonary edema after she was taking triazolam for almost two weeks without any other medications. All possible cardiogenic and non cardiogenic causes were excluded. The condition was severe enough to require non invasive ventilation.Discussion This case differs from the other report of triazolam associated non cardiac pulmonary edema for its severity requiring non invasive ventilation. The pathogenetic mechanism is unknown. Despite the lack of objective evidence to explain pulmonary venous hypertensive changes in our case, we want to advice that triazolam should be used with caution in obese patients, as obesity might aggravate this described drug adverse reaction.
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- 2012
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86. Little Evidence of a Role for the α1 GABAA Subunit-Containing Receptor in a Rhesus Monkey Model of Alcohol Drinking.
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Sawyer, Eileen K., Moran, Casey, Sirbu, Madelynn H., Szafir, Melissa, Linn, Michael, Namjoshi, Ojas, Phani Babu Tiruveedhula, VVN, Cook, James M., and Platt, Donna M.
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ALCOHOLISM , *ANALYSIS of variance , *ANIMAL behavior , *ANIMAL experimentation , *CELL receptors , *ALCOHOL drinking , *ETHANOL , *FLUMAZENIL , *GABA , *PRIMATES , *STATISTICS , *SUCROSE , *T-test (Statistics) , *ZOLPIDEM , *TRIAZOLAM , *DATA analysis , *REPEATED measures design , *DATA analysis software , *DESCRIPTIVE statistics - Abstract
Background Alcohol potentiates GABAergic neurotransmission via action at the GABAA receptor. α1 subunit-containing GABAA receptors have been implicated as mediators, in part, of the behavioral and abuse-related effects of alcohol in rodents. Methods We systematically investigated the effects of 1 α1-preferring benzodiazepine agonist, zolpidem, and 2 antagonists, β-carboline-3-carboxylate-tert-butyl ester ( β CCT) and 3-propoxy- β-carboline hydrochloride (3- PBC), on oral self-administration of alcohol (2% w/v) or sucrose solution and observable behavior in rhesus macaques. We compared these effects to those of the nonselective benzodiazepine agonist triazolam, antagonist flumazenil, and inverse agonist β-carboline carboxylate ( β CCE). Results Alcohol and sucrose solutions maintained reliable baseline drinking behavior across the study. The α1-preferring compounds did not affect intake, number of sipper extensions, or blood alcohol levels ( BALs) at any of the doses tested. Zolpidem, β CCT, and 3- PBC increased latency to first sipper extension in animals self-administering alcohol, but not sucrose, solution. Triazolam exerted biphasic effects on alcohol-drinking behavior, increasing intake at low doses but decreasing BAL and increasing latency at higher doses. At doses higher than those effective in alcohol-drinking animals, triazolam increased sucrose intake and latency. Flumazenil nonsystematically increased number of extensions for alcohol but decreased BAL, with no effects on sucrose drinking. β CCE decreased sipper extensions for alcohol and increased latency for first sucrose sipper extension, but full dose-effect relationships could not be determined due to seizures at higher doses. Conclusions Alcohol-drinking animals appeared more sensitive to the effects of GABAergic compounds on drinking behavior. However, these results do not support a strong contribution of α1 GABAA receptors to the reinforcing effects of alcohol in primates. [ABSTRACT FROM AUTHOR]
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- 2014
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87. オレキシン受容体拮抗薬で睡眠誘導されたマウスは、睡眠中においても危機的状況下では覚醒能力を保持することができる
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orexin ,aversive stimuli ,hypocretin ,hypnotics ,dual orexin receptor antagonist ,triazolam - Abstract
Retention of the ability to wake from sleep in response to dangerous situations is an ideal characteristic of safe hypnotics. We studied the effects of a dual orexin receptor antagonist-22 (DORA-22) and the GABA-A receptor modulator, triazolam, on the ability to wake in response to aversive stimuli. We examined four modalities of sensory inputs, namely, auditory (ultrasonic sound), vestibular (trembling), olfactory (predator odor), and autonomic (hypoxia) stimuli. When the mice fell asleep, one of the four stimuli was applied for 30 s. In the case of auditory stimulation, latency to arousal following vehicle, DORA-22, and triazolam administration was 3.0 (2.0–3.8), 3.5 (2.0–6.5), and 161 (117–267) s (median and 25–75 percentile in the parentheses, n = 8), respectively. Latency to return to sleep after arousal was 148 (95–183), 70 (43–98), and 60 (52–69) s, respectively. Similar results were obtained for vestibular and olfactory stimulation. During the hypoxic stimulation, latencies for arousal and returning to sleep were not significantly different among the groups. The findings of this study are consistent with the distinct mechanisms of these sleep promoting therapies; GABA-A receptor activation by triazolam is thought to induce widespread central nervous system (CNS) suppression while DORA-22 more specifically targets sleep/wake pathways through orexin receptor antagonism. These data support the notion that DORA-22 preserves the ability to wake in response to aversive and consciousness-inducing sensory stimuli, regardless of modality, while remaining effective in the absence of threat. This study provides a unique and important safety evaluation of the potential for certain hypnotics., Shouhei Iwakawa, Yuichi Kanmura and Tomoyuki KuwakiOrexin Receptor Blockade-Induced Sleep Preserves the Ability to Wake in the Presence of Threat in MiceFrontiers in Behavioral Neuroscience, 2019https://doi.org/10.3389/fnbeh.2018.00327
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- 2020
88. High and low ambient temperature at night and the prescription of hypnotics
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Kyoung-Bok Min, Sohyae Lee, and Jin Young Min
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Adult ,Zolpidem ,Triazolam ,medicine.drug_class ,Medication prescription ,Hypnotic ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Physiology (medical) ,Sleep Initiation and Maintenance Disorders ,medicine ,Humans ,Hypnotics and Sedatives ,030212 general & internal medicine ,Medical prescription ,Aged ,business.industry ,Temperature ,Prescriptions ,National health insurance ,Pill ,Anesthesia ,Cohort ,Neurology (clinical) ,business ,030217 neurology & neurosurgery ,medicine.drug - Abstract
Study Objectives This study investigated the association between ambient nighttime temperature and sleep problems assessed by the prescription dose of sleeping pills in South Korean adults. Methods We used the 2002–2015 National Health Insurance Service-National Sample Cohort. A total of 711,079 adults who were 20 years old or older were included, wherein 42,858 adults (~6%) had been prescribed hypnotic medications including zolpidem (N05CF02) and triazolam (N05CD05). Ambient temperature data was calculated as the mean highest temperature of nighttime (23:00–07:00) for every month from January to December. We combined the drug-prescribed date with the administrative districts-level daily nighttime temperature between 2002 and 2015. Results We found that a non-linear, U-shaped relationship between nighttime temperature and hypnotic medication prescription. With an increase per 1°C temperature or an increase in a square per 1°C, the prescription dose of sleeping pills was significantly increased (both p < 0.05). At each 5°C nighttime temperature, subjects belonging to low (≤0°C and 0–5°C) or high (20–25°C and ≥25°C) temperature categories had significantly higher doses of sleeping pills than those at the reference temperature (10–15°C). Changes in nighttime temperature had a significant non-linear effect on the prescribed dosage of hypnotic medications for both adults (p < 0.0001) and the elderly (p = 0.0006). Conclusion We found that either a high or low nighttime temperature was significantly associated with a high daily dose of hypnotic medications in the Korean population.
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- 2020
89. Novel and Nonroutine Benzodiazepines and Suvorexant by LC-MS-MS
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Luke Garcia, Nicholas B Tiscione, Lauren L. Richards-Waugh, and Dustin Tate Yeatman
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Analyte ,Triazolam ,Health, Toxicology and Mutagenesis ,Toxicology ,01 natural sciences ,Analytical Chemistry ,Designer Drugs ,03 medical and health sciences ,Benzodiazepines ,0302 clinical medicine ,Limit of Detection ,Tandem Mass Spectrometry ,medicine ,Environmental Chemistry ,030216 legal & forensic medicine ,Prazepam ,Bromazepam ,Chemical Health and Safety ,Chromatography ,Chemistry ,010401 analytical chemistry ,Azepines ,Flubromazepam ,Triazoles ,Estazolam ,0104 chemical sciences ,Etizolam ,Loprazolam ,medicine.drug ,Chromatography, Liquid - Abstract
Benzodiazepines are a commonly prescribed class of drugs that have the potential for abuse. The Palm Beach County Sheriff’s Office received drug seizure submissions that included novel and/or nonroutine benzodiazepines of increasing prevalence from 2017 to 2019. This prompted the development of a method of analysis for these compounds in biological specimens. The method tests for 16 novel and nonroutine benzodiazepines and suvorexant in whole blood by liquid chromatography–tandem mass spectrometry (LC–MS-MS). The target analytes included bromazepam, clobazam, clonazolam, clotiazepam, diclazepam, estazolam, etizolam, flualprazolam, flubromazepam, flubromazolam, loprazolam, lormetazepam, phenazepam, prazepam, suvorexant, tetrazepam and triazolam. The method uses 200 µL of sample, protein precipitation and an instrument run-time of 8 min. The limit of detection was either 1 or 5 ng/mL and the limit of quantitation was either 5 or 25 ng/mL depending on the analyte. The method was validated for quantitative analysis for 15 out of the 17 analytes. Flubromazepam and prazepam were validated for qualitative identification only. A quadratic calibration model (r2 > 0.990) with 1/x weighting was used for all analytes for quantitative analysis. The calibration range was either 5–100 or 25–500 ng/mL depending on the analyte. The coefficient of variation of replicate analyses was within 14% and bias was within ±14%. The method provides a sensitive, efficient and robust procedure for the quantitation and/or qualitative identification of select novel and nonroutine benzodiazepines and suvorexant using LC–MS-MS and a sample volume of 200 µL.
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- 2020
90. Detailed quantum mechanical studies on bioactive benzodiazepine derivatives and their adsorption over graphene sheets
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Jamelah S. Al-Otaibi
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Chemistry, Pharmaceutical ,Electrons ,Serum Albumin, Human ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Analytical Chemistry ,law.invention ,symbols.namesake ,Electron transfer ,Benzodiazepines ,Computational chemistry ,law ,Orexin Receptors ,Catalytic Domain ,Molecule ,Humans ,Instrumentation ,Lone pair ,Spectroscopy ,Alprazolam ,Chemistry ,Graphene ,Relaxin ,Triazolam ,Interaction energy ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Estazolam ,Molecular Docking Simulation ,Docking (molecular) ,Spectrophotometry ,symbols ,Quantum Theory ,Graphite ,Adsorption ,0210 nano-technology ,Raman spectroscopy ,Algorithms ,Natural bond orbital - Abstract
Estazolam (Z1) and related derivatives, adinazolam (Z2), alprazolam (Z3), 4-hydroxyalprazolam (Z4) and triazolam (Z5) have been studied by using various computational tools to analyze their geometry and spectral characteristics. The compounds were found to interact with graphene monolayer results shows that there is enhancement in various physico-chemical descriptors and surface enhanced Raman spectra (SERS). The various reactive descriptors obtained from the FMO analysis predict the reactive nature of the compound. The various lone pair/sigma to pi conjugation was analyzed using NBO formalism, which provides valuable information about intra molecular electron transfer which is vital in predicting the inherent stability of the molecule. Simulated electronic spectra using TD-DFT and CAM-B3LYP functional are discussed in detail with respect to electronic transitions and light harvesting efficiency. Suitability of candidates as a photo sensitizer in dye sensitized solar cells was studied and 4-Hydroxyalprazolam is identified as a suitable candidate. Nucleophilic and electrophilic regions of the molecules are identified using MESP, which adds to the reactivity information. It can be seen that the highest interaction energy has been obtained in the case of the Z5-graphene system, while the lowest interaction energy has been obtained in the case of the Z1-graphene system. Docking indicates that the ligands adsorbed over graphene also form stable complexes with the receptors as indicated by the high binding affinity energy values.
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- 2020
91. Femoral blood concentrations of flualprazolam in 33 postmortem cases
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Gunilla Thelander, Robert Kronstrand, Svante Vikingsson, Pirkko Kriikku, Ilpo Rasanen, Ilkka Ojanperä, Medicum, Department of Forensic Medicine, and University of Helsinki
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Male ,Pediatrics ,Triazolam ,Post-mortem toxicology ,01 natural sciences ,METABOLITES ,Designer Drugs ,Benzodiazepines ,0302 clinical medicine ,Finland ,media_common ,Cause of death ,Flualprazolam ,Molecular Structure ,319 Forensic science and other medical sciences ,Middle Aged ,3. Good health ,Suicide ,Alprazolam ,Population study ,Female ,medicine.drug ,Drug ,Adult ,Designer benzodiazepines ,medicine.medical_specialty ,Adolescent ,medicine.drug_class ,Substance-Related Disorders ,media_common.quotation_subject ,Gas Chromatography-Mass Spectrometry ,Pathology and Forensic Medicine ,03 medical and health sciences ,Forensic Toxicology ,Young Adult ,Age Distribution ,medicine ,Humans ,030216 legal & forensic medicine ,Sex Distribution ,Aged ,Sweden ,Benzodiazepine ,Psychotropic Drugs ,business.industry ,010401 analytical chemistry ,0104 chemical sciences ,New psychoactive substances ,Concomitant ,Accidents ,Flubromazolam ,business ,Law - Abstract
Flualprazolam is a novel designer benzodiazepine, structurally related to alprazolam, flubromazolam and triazolam. In the last couple of years, it has been frequently detected in seizures and in forensic cases in Sweden and Finland. However, there is a lack of published blood concentrations for the drug, which presents difficulties when assessing its relevance for the cause of death. A quantitative method for the determination of flualprazolam in post-mortem blood was developed and validated, and subsequently used to analyse samples from 33 deaths previously screened as testing positive for flualprazolam in Sweden and Finland. Most of the cases in the study were accidental deaths (61 %) or suicides (18 %). The median (range) flualprazolam concentration was 18.0 (3.0-68) ng/g. The majority of the deceased were male (82 %) and the median age was 30 years. The median age in the Swedish cases was significantly higher (35 years) than in the Finnish cases (23 years) (p
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- 2020
92. The risk of fractures, acute myocardial infarction, atrial fibrillation and ventricular arrhythmia in geriatric patients exposed to promethazine
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Maurizio Sessa, Morten Andersen, Kim Dalhoff, Annamaria Mascolo, Sessa, Maurizio, Mascolo, Annamaria, Dalhoff, Kim Peder, and Andersen, Morten
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Male ,medicine.medical_specialty ,drug safety ,Denmark ,Beers Criteria ,Myocardial Infarction ,030204 cardiovascular system & hematology ,03 medical and health sciences ,Fractures, Bone ,0302 clinical medicine ,Risk Factors ,Internal medicine ,Atrial Fibrillation ,medicine ,cohort study ,Humans ,Pharmacology (medical) ,Myocardial infarction ,Registries ,cardiovascular diseases ,beers criteria ,health care economics and organizations ,Aged ,business.industry ,Atrial fibrillation ,Arrhythmias, Cardiac ,Triazolam ,General Medicine ,Loratadine ,medicine.disease ,artificial intelligence ,Domperidone ,Promethazine ,Hospitalization ,Geriatric patient ,machine learning ,030220 oncology & carcinogenesis ,Cardiology ,cardiovascular system ,promethazine ,Female ,business ,nationwide ,Cohort study ,medicine.drug ,Betahistine - Abstract
Objectives: This study aimed to compare the risk of fractures, acute myocardial infarction, atrial fibrillation, and ventricular arrhythmia among Danish citizens aged ≥ 65 which were new users of promethazine or domperidone, triazolam, loratadine, and betahistine. Secondly, the study aimed to perform a risk stratification to identify the most relevant predictors for the study outcomes. Methods: The study period was 01/01/2015 to 31/12/2016. The data sources were the Danish registers. Each patient was followed for 90 days. A logistic regression model was used to compute the unadjusted and adjusted odds ratios (OR), and a conditional inference tree was used to identify the most relevant predictors for the study outcomes. Results: Promethazine had a higher risk of hospitalization for atrial fibrillation than loratadine and betahistine (OR 1.58; 95% CI 1.07–2.63 and OR 3.22; 95% CI 1.69–7.14, respectively). For fractures, acute myocardial infarction, and ventricular arrhythmia hospitalizations, no statistically significant differences were found among drugs under investigation. The medical history of cardiac arrhythmia (OR 4.14; 95% CI 2.94–5.78, p < 0.0001) was the most relevant predictor for atrial fibrillation hospitalizations. Conclusion: This study found an increased risk of atrial fibrillation hospitalization among promethazine users, and the risk was higher among patients with prior cardiac arrhythmia.
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- 2020
93. Effect of pretreatment regimens of 1-aminobenzotriazole on metabolism and gastric emptying of probe compounds in rat
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Ajay Saxena, Vinay K. Holenarsipur, Shweta Padmanabhan, Abhijith Rao, Yogesh Kumar Gupta, Harbeer Kaur, and T. Thanga Mariappan
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Male ,Triazolam ,Health, Toxicology and Mutagenesis ,Administration, Oral ,Absorption (skin) ,Pharmacology ,Toxicology ,030226 pharmacology & pharmacy ,Biochemistry ,Mean Absorption Time ,Rats, Sprague-Dawley ,03 medical and health sciences ,0302 clinical medicine ,Cytochrome P-450 Enzyme System ,medicine ,Animals ,Cytochrome P-450 Enzyme Inhibitors ,Acetaminophen ,Gastric emptying ,biology ,Chemistry ,Area under the curve ,Cytochrome P450 ,General Medicine ,Metabolism ,Triazoles ,Rats ,Gastric Emptying ,Area Under Curve ,030220 oncology & carcinogenesis ,biology.protein ,medicine.drug - Abstract
1-Aminobenzotriazole (ABT) is a mechanism-based inactivator of major cytochrome P450 (CYP) enzymes, which is used in multiple mechanistic studies. The purpose was to evaluate the effect of 2 and 16-h pretreatment regimens of ABT on the exposures of triazolam in rat. Another objective was to evaluate the effect of ABT on gastric emptying of acetaminophen. Plasma area under the curve (AUC) of triazolam was increased by 101-fold and 81-fold for the rats pretreated with ABT at 2 and 16 h, respectively, compared to control rats. Time to reach maximum concentration was 0.3, 4.8 and 3.7 h in control, 2 and 16-h pretreatment animals, respectively. In the case of acetaminophen, where Tmax was not delayed, the mean absorption time (MAT) in control, 2 and 16 h ABT pretreatment groups were 0.3, 4.6 and 2.9 h, respectively, suggesting delayed absorption. This hypothesis was further supported by GastroPlusTM simulation. In summary, extent of triazolam absorption was increased to a similar extent with both 2 and 16 h ABT pretreatment regimens, suggesting that either of the regimen can be used to increase parent exposures in rat. With ABT pretreatment, delayed absorption of triazolam and acetaminophen was observed, as suggested by delay in Tmax and MAT, respectively.
- Published
- 2018
94. Flualprazolam: Report of an Outbreak of a New Psychoactive Substance in Adolescents
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Roy Gerona, Adam Blumenberg, Ross Ellison, Andrew Reckers, and Adrienne Hughes
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Drug ,Male ,medicine.medical_specialty ,Triazolam ,Poison Control Centers ,Adolescent ,medicine.drug_class ,Substance-Related Disorders ,Sedation ,media_common.quotation_subject ,Mass Spectrometry ,Designer Drugs ,Disease Outbreaks ,03 medical and health sciences ,Oregon ,0302 clinical medicine ,030225 pediatrics ,medicine ,Humans ,Depression (differential diagnoses) ,media_common ,Coma ,Benzodiazepine ,business.industry ,Hospitalization ,Substance Abuse Detection ,Alprazolam ,Pediatrics, Perinatology and Child Health ,Emergency medicine ,Female ,medicine.symptom ,business ,medicine.drug ,Medical literature - Abstract
Flualprazolam is a nonregistered drug in the benzodiazepine family and constitutes a new psychoactive substance (NPS). Since 2014, a growing number of designer benzodiazepines have become available over the Internet and on the counterfeit drug market. In June 2019, a cluster of patients intoxicated with flualprazolam was identified by the Oregon Poison Center. As an emerging drug of abuse, the clinical characteristics of flualprazolam have been poorly characterized thus far. Over a one-week period, 6 teenagers presented to local emergency departments after ingesting illegally obtained counterfeit alprazolam, which led to sedation. Other symptoms included slurred speech, confusion, and mild respiratory depression. All 6 patients had resolution of their symptoms within 6 hours of ingestion. Blood and urine samples, as well as a tablet fragment, were obtained from 3 patients. The tablet and biological samples were analyzed by using liquid chromatography–quadrupole time-of-flight mass spectrometry and were found to contain the NPS flualprazolam without other drugs or intoxicants. With this case series, we add to the medical literature a clinical description of an emerging drug of abuse. Flualprazolam appears to share the clinical properties of other benzodiazepines. As flualprazolam and other NPSs become more common, physicians must be aware of their availability and characteristics. Sedation lasting
- Published
- 2019
95. Fabrication of magnetic zinc adeninate metal-organic frameworks for the extraction of benzodiazepines from urine and wastewater
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Chunxiao Zhang, Defeng Fu, Hongting Zhao, Suling Zhang, and Weixuan Yao
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Detection limit ,Triazolam ,Chromatography ,Adenine ,Magnetic Phenomena ,010401 analytical chemistry ,Extraction (chemistry) ,chemistry.chemical_element ,Filtration and Separation ,Wastewater ,010402 general chemistry ,01 natural sciences ,Estazolam ,0104 chemical sciences ,Analytical Chemistry ,Benzodiazepines ,Zinc ,Adsorption ,chemistry ,medicine ,Metal-organic framework ,Cobalt ,Metal-Organic Frameworks ,medicine.drug - Abstract
In this study, an alternative method for synthesizing magnetic cobalt adeninate metal-organic frameworks was developed, and the synthesized materials were examined for their potential application for separating and enriching benzodiazepines from complex samples. Benzodiazepines, widely used as hypnotics, muscle relaxants, sedatives, and anxiolytics, are a class of drugs that require accurate detection and monitoring. Results showed that Fe3 O4 nanoparticles could be well anchored onto the external surface of cobalt adeninate metal-organic frameworks by using amino-silane as a linkage. Their adsorption of benzodiazepines was mainly promoted by intermolecular hydrogen binding, π-π interactions and electrostatic attraction. Their potential application was evaluated by extraction of benzodiazepines in urine and wastewater samples prior to liquid chromatography with mass spectrometry. Under optimum conditions, the calibration curves were linear with a correlation coefficient of ≥0.9928 in the concentration range of 10-5000 ng/L for lorazepam and 5-5000 ng/L for estazolam, chlordiazepoxide, alprazolam, midazolam and triazolam. The limits of detection were in the range of 0.71-2.49 ng/L. The percent of extraction recoveries were 80.2-94.5% for urine and 84.1-94.4% for wastewater, respectively. Results suggested that magnetic cobalt adeninate metal-organic frameworks could potentially be a promising material for enriching benzodiazepines from urine and wastewater with high accuracy and precision.
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- 2018
96. Effect of non-prohibited drugs on the phase II metabolic profile of morphine. An in vitro investigation for doping control purposes
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Francesco Botrè, Maria Kristina Parr, Gabriella Ambrosio, Monica Mazzarino, and Xavier de la Torre
- Subjects
Ketoprofen ,drug-drug interactions ,Antifungal Agents ,Triazolam ,anti-doping analysis ,masking strategy ,morphine ,Pharmaceutical Science ,In Vitro Techniques ,Pharmacology ,030226 pharmacology & pharmacy ,01 natural sciences ,Analytical Chemistry ,Benzodiazepines ,03 medical and health sciences ,0302 clinical medicine ,Tandem Mass Spectrometry ,medicine ,Humans ,Environmental Chemistry ,Drug Interactions ,Glucuronosyltransferase ,Spectroscopy ,Bromazepam ,Morphine ,Chemistry ,Anti-Inflammatory Agents, Non-Steroidal ,010401 analytical chemistry ,Lorazepam ,Lormetazepam ,0104 chemical sciences ,Substance Abuse Detection ,Alprazolam ,Microsomes, Liver ,Ketoconazole ,Chromatography, Liquid ,medicine.drug ,Nimesulide - Abstract
The potential consequences of drug-drug interaction on the strategies adopted by anti-doping laboratories to report an adverse analytical finding for morphine were investigated. We evaluated in vitro the effects of 14 drugs on the principal metabolic pathways of morphine. The selected drugs are among those most commonly used by the athletes, none of them presently included in the World Anti-Doping Agency (WADA) Prohibited List. The non-prohibited drugs included 4 antifungals (fluconazole, itraconazole, ketoconazole, and miconazole), 6 benzodiazepines (alprazolam, bromazepam, clonazepam, lorazepam, lormetazepam, and triazolam), and 4 non-steroidal anti-inflammatory drugs (diclofenac, ibuprofen, ketoprofen, and nimesulide). The in vitro assays were based on the use of either human liver microsomes or uridine 5'-diphospho-glucuronosyl-transferases. Morphine and its glucuronides were determined by developed liquid chromatography-mass spectrometry procedure after dilution with an aqueous solution containing their deuterated isotopologues as internal standards. Morphine is mainly excreted as phase II metabolites: about 70% of the parent compound is found to be biotransformed by UGT2B7 to morphine-3-glucuronide (6065%) and morphine-6-glucuronide (5-10%). A reduction of the enzymatic activity of the UGT2B7 was recorded in the presence of 9 of the 14 drugs under investigation (ketoconazole, miconazole, itraconazole, diclofenac, ibuprofen, clonazepam, lorazepam, lormetazepam, and triazolam), with a consequent significant reduction of the levels of the glucuronide metabolites. This phenomenon in vivo may affect the rate of the urinary excretion of morphine with the risk of reporting "false negative" results, especially in case of results close to the decision limit value set by WADA.
- Published
- 2018
97. Triazolam
- Author
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Goldstein, Sam, editor and Naglieri, Jack A., editor
- Published
- 2011
- Full Text
- View/download PDF
98. TRIAZOLAM IN DENTAL MEDICINE. INDICATIONS.
- Author
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BUCĂ, ADRIAN, FRĂŢILĂ, ANCA, ROMANEC, CRISTIAN, and SABĂU, MARIANA
- Subjects
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TRIAZOLAM , *OUTPATIENT medical care , *DENTAL clinics , *DRUG administration , *THERAPEUTICS - Abstract
This article will present the use of Triazolam in the dental office setting. While in United States the Triazolam may serve as oral sedation in the dental office, in Romania this medication is not used. The article presents a retrospective study done on 79 patients. The patients were administered Triazolam for oral sedation in order to help with the outpatient treatment. During the treatment patients were connected to oxygen canula, and were continuously monitored with pulse-oxymeter. The Triazolam was administered to patients with high anxiety, where long dental appointments were necessary. 5% of these patients necessitated the use of N2O2 as addition to the oral sedation. During the treatment an average of four dosages of 0,25mg of Triazolam were used over a period of 4-5 hours of treatment, with no more than five dosages being administered over 7 hours of treatment. In order to avoid an involuntary apnea the authors used oxygen on nasal canula (2l/min), and as result the oxygen level measured by pulseoxymeter never fell below 87%. The use of Triazolam allows the anxiety control for long duration dental treatment, improving the comfort of the patient. [ABSTRACT FROM AUTHOR]
- Published
- 2013
99. TRIAZOLAMUL ÎN MEDICINA DENTARĂ. INDICAŢII.
- Author
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BUCĂ, ADRIAN, FRĂŢILĂ, ANCA, ROMANEC, CRISTIAN, and SABĂU, MARIANA
- Subjects
- *
TRIAZOLAM , *CONSCIOUS sedation , *DENTAL care , *OUTPATIENT medical care - Abstract
This article will present the use of Triazolam in the dental office setting. While in United States the Triazolam may serve as oral sedation in the dental office, in Romania this medication is not used. The article presents a retrospective study done on 79 patients. The patients were administered Triazolam for oral sedation in order to help with the outpatient treatment. During the treatment patients were connected to oxygen canula, and were continuously monitored with pulse-oxymeter. The Triazolam was administered to patients with high anxiety, where long dental appointments were necessary. 5% of these patients necessitated the use of N2O2 as addition to the oral sedation. During the treatment an average of four dosages of 0,25mg of Triazolam were used over a period of 4-5 hours of treatment, with no more than five dosages being administered over 7 hours of treatment. In order to avoid an involuntary apnea the authors used oxygen on nasal canula (2l/min), and as result the oxygen level measured by pulseoxymeter never fell below 87%. The use of Triazolam allows the anxiety control for long duration dental treatment, improving the comfort of the patient. [ABSTRACT FROM AUTHOR]
- Published
- 2013
100. Evaluation of animal models for intestinal first-pass metabolism of drug candidates to be metabolized by CYP3A enzymes via in vivo and in vitro oxidation of midazolam and triazolam.
- Author
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Kuze, J., Mutoh, T., Takenaka, T., Oda, N., Hanioka, N., and Narimatsu, S.
- Subjects
- *
INTESTINES , *MIDAZOLAM , *GRAPEFRUIT juice , *TRIAZOLAM , *CYTOCHROME P-450 , *MICROSOMES - Abstract
1. To search an appropriate evaluation methodology for the intestinal first-pass metabolism of new drug candidates, grapefruit juice (GFJ)- and vehicle (tap water)-pretreated mice or rats were orally administered midazolam (MDZ) or triazolam (TRZ), and blood levels of the parent compounds and their metabolites were measured by liquid chromatography/MS/MS. A significant effect of GFJ to elevate the blood levels was observed only for TRZ in mice. 2. In vitro experiments using mouse, rat and human intestinal and hepatic microsomal fractions demonstrated that GFJ suppressed the intestinal microsomal oxidation of MDZ and especially TRZ. Substrate inhibition by MDZ caused reduction in 1′-hydroxylation but not 4-hydroxylation in both intestinal and hepatic microsomal fractions. The kinetic profiles of MDZ oxidation and the substrate inhibition in mouse intestinal and hepatic microsomal fractions were very similar to those in human microsomes but were different from those in rat microsomes. Furthermore, MDZ caused mechanism-based inactivation of cytochrome P450 3A-dependent TRZ 1′-hydroxylation in mouse, rat and human intestinal microsomes with similar potencies. 3. These results are useful information in the analysis of data obtained in mouse and rat for the evaluation of first-pass effects of drug candidates to be metabolized by CYP3A enzymes. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
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