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Etoricoxib is a non-steroidal anti-inflammatory drug (NSAID) used to treat pain and inflammation. The objective of the current study was to develop a sensitive, fast and high-throughput HPLC-ESI-MS/MS method to measure etoricoxib levels in human plasma using a one-step methanol protein precipitation technique. A tandem mass spectrometer equipped with an electrospray ionization (ESI) source operated in a positive mode and multiple reaction monitoring (MRM) were used for data collection. The quantitative MRM transition ions were m/z 359.15 > 279.10 and m/z 363.10 > 282.10 for etoricoxib and IS. The linear range was from 10.00 to 4000.39 ng/mL and the validation parameters were within the acceptance limits of the European Medicine Agency (EMA) and Food and Drug Analysis (FDA) guidelines. The present method was sensitive (10.00 ng/mL with S/N > 40), simple, selective (K prime > 2), and fast (short run time of 2 min), with negligible matrix effect and consistent recovery, suitable for high throughput analysis. The method was used to quantitate etoricoxib plasma concentrations in a bioequivalence study of two 120 mg etoricoxib formulations. Incurred sample reanalysis results further supported that the method was robust and reproducible. [ABSTRACT FROM AUTHOR]

Statins are the mainstay for the treatment of dyslipidemia. Recently, rosuvastatin has also been demonstrated to possess analgesic properties in animal studies. The present study has been planned to further confirm the analgesic activity of rosuvastatin, etoricoxib, tramadol, amlodipine, and amitriptyline and study the interaction of rosuvastatin with the above-mentioned analgesics. The objective of the study was to confirm the analgesic activity of rosuvastatin and determine the minimum analgesic dose of rosuvastatin, etoricoxib, tramadol, amlodipine and amitriptyline and to study the analgesic effect of combination of subanalgesic doses of rosuvastatin with sub-analgesic doses of etoricoxib, tramadol, amlodipine, and amitriptyline. After IAEC approval, the study was carried out in albino mice in two phases. In phase I, the analgesic effect of rosuvastatin, etoricoxib, tramadol, amlodipine, and amitriptyline was confirmed by using tail-flick and writhing methods. In phase II, analgesic effect of combinations of subanalgesic dose of rosuvastatin with subanalgesic dose of etoricoxib, tramadol, amlodipine, and amitriptyline was studied. Minimal analgesic dose of rosuvastatin, etoricoxib, tramadol, amlodipine, and amitriptyline was observed as 5, 20, 10, 5, and 10 mg/kg, respectively. In phase II, combination of subanalgesic dose of rosuvastatin 2.5 mg/kg with subanalgesic doses of etoricoxib (10 mg/kg), tramadol (5 mg/kg), amlodipine (2.5 mg/kg), and amitriptyline (5 mg/kg), demonstrated synergistic analgesic activity. Rosuvastatin exerts dose-dependent analgesic activity that is synergistic to that of etoricoxib, tramadol, amlodipine, and amitriptyline. If established in clinical studies as well, this finding can lead to the reduction of analgesic dosing in patients already on statins. [ABSTRACT FROM AUTHOR]

For patients with breast cancer who receive docetaxel chemotherapy, taxane-associated acute pain syndrome (T-APS), considered a form of neural pathology, is a significant clinical problem. We evaluated the effect of prophylactic etoricoxib on T-APS in patients with breast cancer. We conducted a phase II randomised trial including 144 patients with breast cancer receiving four cycles of docetaxel-based chemotherapy. Patients were randomised in the ratio 1:1 to receive prophylactic etoricoxib (60 mg, Day 1 to Day 8) or no prophylactic treatment. The primary end-point was the overall incidence of T-APS across all cycles. Secondary end-points included the incidence of severe pain (greater than 5 on a scale 0–10); severity and duration of T-APS; Functional Assessment of Cancer Therapy-Breast subscale; chronic sensory and motor neurotoxicity and adverse events. The overall incidence of T-APS across all cycles of chemotherapy in the etoricoxib group was 57.1%, while that in the control group was 91.5% (P < 0.001). The incidences of severe T-APS were 11.4% and 54.9% for the etoricoxib and control groups, respectively (P < 0.001). The mean Functional Assessment of Cancer Therapy-Breast subscale score of the etoricoxib group (103.79–107.24) was significantly higher than that of the control group (93.88–96.71) (P = 0.001 at cycle 1 and P < 0.001 at cycles 2–4). After four cycles of docetaxel chemotherapy, the etoricoxib group demonstrated a significantly higher mean Functional Assessment of Cancer Treatment Neurotoxicity subscale score than the control group (38.46, 95% CI: 37.63–39.29; 34.59, 95% CI: 33.73–35.45, respectively; P < 0.001). Electromyography showed that most peripheral sensory nerves in the etoricoxib group had significantly improved action potential amplitudes and conduction velocities compared with those in the control group. Prophylactic use of etoricoxib could significantly reduce the incidence and severity of docetaxel-induced acute pain syndrome and potentially decrease docetaxel-induced peripheral neuropathy. ClinicalTrials.gov, NCT04565600. • Prophylactic etoricoxib reduce the incidence of docetaxel-induced acute pain syndrome. • Prophylactic etoricoxib may attenuate docetaxel-induced peripheral neuropathy. • Supporting that acute taxane-induced pain syndrome is a form of nerve pathology. [ABSTRACT FROM AUTHOR]

A novel environmentally friendly reversed-phase high-performance liquid chromatography (RP-HPLC) method has been effectively validated for simultaneously measuring a prospective conjunction of tizanidine (TIZ) and etoricoxib (ETC), the combined medicine, in rat plasma. The technique employs diclofenac potassium as the internal standard, guaranteeing dependable and precise outcomes. This study aimed to assess the impact of the suggested combination therapy on treating inflammation resulting from rheumatoid arthritis (RA) in a rat model. The procedure was performed using an Agilent series 1200 model HPLC apparatus. The chromatographic conditions consist of isocratic elution mode, C18 column with dimensions of 150 mm × 4.6 mm × 5 µm, flow rate of 1.5 mL/min, wavelength of 230 nm, temperature of 50°C, and injection volume of 10 µL. The elution was performed using a mobile phase consisting of a phosphate buffer with a pH of 3.5 and acetonitrile in a ratio of 80:20 v/v. Calibration curves were conducted for TIZ and ETC within the 1-50 µg/mL range, demonstrating linear trends with R 2 values over 0.999. The effectiveness and eco-friendliness of the proposed method were evaluated using eight separate environmentally conscious metrics. The addition of TIZ and ETC to arthritic rodents amplified these effects significantly. Furthermore, TIZ and ETC significantly reduced serum levels in arthritic rodents, and safety investigations revealed normal complete blood count, liver, and renal functions. TIZ and ETC appear to have antiarthritic, anti-inflammatory, and safe combinations, making them viable future treatment options for RA that are also safe and efficacious. Following validation by United States Food and Drug Administration (US-FDA) rules, all goods met the criteria., (© 2024 Deutsche Pharmazeutische Gesellschaft.)

Abstract Background How to prevent pain after the extraction of impacted teeth is a serious challenge for all patients. The purpose of this clinical trial was to investigate whether pre-emptive low dose of etoricoxib can reduce postoperative pain in patients undergoing third molars surgery. Methods Patients were randomised to receive etoricoxib 60 mg or placebo 30 min before surgery. Post-operative pain was recorded using a visual analogue scale during 24 h within the post-operative period. The total dose of ibuprofen rescue intake was recorded. Kaplan–Meier curves and log-rank analyses were used to evaluate the proportion of patients without rescue analgesic. Results Scores for the post-operative pain in the etoricoxib group were significantly lower than those in the placebo group during first 12 h (p

Low back pain is one of the most common reasons for seeking medical attention. Musculoskeletal (nonspecific) pain is the most common (90%) cause of chronic pain. Depressive and anxiety disorders, sleep disorders, mainly in the form of insomnia, which negatively affect the course of the disease, are often encountered as comorbid disorders in patients with chronic musculoskeletal low back pain (CMLBP). When managing patients, it is effective to use an integrated approach: drug therapy, kinesitherapy and psychological methods. Kinesitherapy uses various types of exercise and walking; it is important that they are performed regularly under the supervision of a specialist, excluding excessive physical and static loads. Cognitive-behavioral therapy is the most effective psychological effect in CMLBP, which should be directed not only to pain, but also to insomnia, depression and anxiety disorders. Non-steroidal anti-inflammatory drugs (NSAIDs) are used as drugs for chronic pain. It is important to take into account the presence of risk factors, concomitant diseases, interactions with other drugs. The use of etoricoxib (Arcoxia) for chronic low back pain is discussed. The author presents his own experience in managing 71 patients (average age 55) with CMLBP using kinesitherapy, psychological methods, and NSAIDs. As a result of treatment after 3 months, a significant decrease in VAS was achieved from 8 (6-8) to 2 (0-4) points (p < 0.0001), the depression decreased from 7 (5-9) to 4 (3-6) points in HADS (p = 0.002), the anxiety from 7 (5-10) to 5 (3-7) points in HADS (p = 0.0003), a decrease in disabilities according to the Oswestry question-naire from 46 (34-57.77) to 11.11 (4.44-26) percent (p < 0.0001), increase in physical activity according to IPAQ-SF from 11 (7-16) to 23 (15-26 ) points (p = 0.0002), decrease insomnia according to ISI from 12 (7-15) to 6 (2-10) points (p < 0.001), improvement in sleep quality according to PSQI from 9 (7-13) points up to 4 (2-9) points (p < 0.001). The widespread introduction of complex treatment of patients with CMLBP is of great medical and social importance.

Toxic epidermal necrolysis is a potentially life-threatening dermatological condition whose pathogenesis and exact treatment are not yet known. Drugs like anticonvulsants, allopurinol and non-steroidal anti-inflammatory drugs like etoricoxib, a selective cyclo-oxygenase-2 inhibitor prescribed for pain management are associated with a high risk of toxic epidermal necrolysis. It is also associated with immunodeficiency and dysregulated immune reactions like systemic lupus erythematosus, an autoimmune disease in which organs and cells undergo damage initially mediated by tissue binding auto-antibodies and immune complexes. Here, a 34 year old lady was presented in emergency with multiple maculopapular rashes over the neck and trunk region after treatment with etoricoxib for osteoarthritis of the left foot.

An RP-HPLC technique was used to produce a cost-effective simultaneous quantification of Etoricoxib and Paracetamol in combined pharmaceutical tablet dosage forms. The approach was validated for Etoricoxib and Paracetamol using ICH recommendations over a range of 20-120ppm and 20-200ppm, respectively. At a temperature of 250C±0.50C, an analytical column PURITAS™ EXIMIUS C18, 250mmx4.6mm, 5 microns was utilized. At a flow rate of 1.0 ml/min, the mobile phase was acetonitrile and 0.1 percent acetic acid in water in a 70:30V/V ratio. The elution was examined using a PDA detector with a detection wavelength of 235nm. The retention times for Etoricoxib and paracetamol are 4.2 and 2.1 minutes, respectively. The percentage recoveries for Etoricoxib and paracetamol were 98.28% and 102.1%, respectively. The RSD values are not greater than 2%. [ABSTRACT FROM AUTHOR]

The introduction of selective COX-2 inhibitors (so-called 'coxibs') has demonstrated tremendous commercial success due to their claimed lower potential of serious gastrointestinal adverse effects than traditional NSAIDs. However, following the repeated questioning on safety concerns, the coxibs 'controversial me-too' saga increased substantially, inferring to the risk of cardiovascular complications, subsequently leading to the voluntary withdrawal of coxibs (e.g., rofecoxib and valdecoxib) from the market. For instance, the makers (Pfizer and Merck) had to allegedly settle individual claims of cardiovascular hazards from celecoxib and valdecoxib. Undoubtedly, the lessons drawn from this saga revealed the flaws in drug surveillance and regulation, and taught science to pursue a more integrated translational approach for data acquisition and interpretation, prompting science-based strategies of risk avoidance in order to sustain the value of such drugs, rather than their withdrawal. Looking forward, coxibs are now being studied for repurposing, given their possible implications in the management of a myriad of diseases, including cancer, epilepsy, psychiatric disorders, obesity, Alzheimer's disease, and so on. This article briefly summarizes the development of COX-2 inhibitors to their market impression, followed by the controversy related to their toxicity. In addition, the events recollected in hindsight (the past lessons), the optimistic step towards drug repurposing (the present), and the potential for forthcoming success (the future) are also discussed. [ABSTRACT FROM AUTHOR]