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1. Combinations of QTc-prolonging drugs: towards disentangling pharmacokinetic and pharmacodynamic effects in their potentially additive nature

Author

Meid, A, Bighelli, I, Mächler, S, Mikus, G, Carrà, G, Castellazzi, M, Lucii, C, Martinotti, G, Nosè, M, Ostuzzi, G, Acciavatti, T, Adamo, A, Aguglia, A, Albanese, C, Baccaglini, S, Bardicchia, F, Barone, R, Barone, Y, Bartoli, F, Bergamini, C, Bertolini, F, Bolognesi, S, Bordone, A, Bortolaso, P, Bugliani, M, Calandra, C, Calò, S, Cardamone, G, Caroleo, M, Carra, E, Carretta, D, Chiocchi, L, Cinosi, E, Clerici, M, Corbo, M, Corsi, E, Costanzo, R, Costoloni, G, D’Arienzo, F, Debolini, S, De Capua, A, Di Napoli, W, Dinelli, M, Facchi, E, Fargnoli, F, Fiori, F, Franchi, A, Gardellin, F, Gastaldon, C, Gazzoletti, E, Ghio, L, Giacomin, M, Gregis, M, Iovieno, N, Koukouna, D, Lax, A, Lintas, C, Luca, A, Luca, M, Lussetti, M, Madrucci, M, Magnani, N, Magni, L, Manca, E, Martorelli, C, Mattafirri, R, Paladini, C, Papola, D, Percudani, M, Perini, G, Petrosemolo, P, Pezzullo, M, Piantanida, S, Pinna, F, Prato, K, Prestia, D, Quattrone, D, Reggianini, C, Restaino, F, Ribolsi, M, Rinosi, G, Rizzo, C, Rizzo, R, Roggi, M, Rossi, G, Rossi, S, Ruberto, S, Santi, M, Santoro, R, Sepede, G, Signorelli, M, Soscia, F, Staffa, P, Stilo, M, Strizzolo, S, Suraniti, F, Tavian, N, Tortelli, L, Tosoni, F, Valdagno, M, Zanobini, V, Barbui, C, Haefeli, W, A. D. Meid, I. Bighelli, S. Mächler, G. Mikus, G. Carrà, M. Castellazzi, C. Lucii, G. Martinotti, M. Nosè, G. Ostuzzi, T. Acciavatti, A. Adamo, A. Aguglia, C. Albanese, S. Baccaglini, F. Bardicchia, R. Barone, Y. Barone, F. Bartoli, C. Bergamini, F. Bertolini, S. Bolognesi, A. Bordone, P. Bortolaso, M. Bugliani, C. Calandra, S. Calò, G. Cardamone, M. Caroleo, E. Carra, D. Carretta, L. Chiocchi, E. Cinosi, M. Clerici, M. Corbo, E. Corsi, R. Costanzo, G. Costoloni, F. D’Arienzo, S. Debolini, A. De Capua, W. A. Di Napoli, M. Dinelli, E. Facchi, F. Fargnoli, F. Fiori, A. Franchi, F. Gardellin, C. Gastaldon, E. Gazzoletti, L. Ghio, M. Giacomin, M. Gregis, N. Iovieno, D. Koukouna, A. Lax, C. Lintas, A. Luca, M. Luca, M. Lussetti, M. Madrucci, N. Magnani, L. Magni, E. Manca, C. Martorelli, R. Mattafirri, C. Paladini, D. Papola, M. Percudani, G. Perini, P. Petrosemolo, M. Pezzullo, S. Piantanida, F. Pinna, K. Prato, D. Prestia, D. Quattrone, C. Reggianini, F. Restaino, M. Ribolsi, G. Rinosi, C. Rizzo, R. Rizzo, M. Roggi, G. Rossi, S. Rossi, S. Ruberto, M. Santi, R. Santoro, G. Sepede, M. S. Signorelli, F. Soscia, P. Staffa, M. Stilo, S. Strizzolo, F. Suraniti, N. Tavian, L. Tortelli, F. Tosoni, M. Valdagno, V. Zanobini, C. Barbui, W. E. Haefeli, Meid, A, Bighelli, I, Mächler, S, Mikus, G, Carrà, G, Castellazzi, M, Lucii, C, Martinotti, G, Nosè, M, Ostuzzi, G, Acciavatti, T, Adamo, A, Aguglia, A, Albanese, C, Baccaglini, S, Bardicchia, F, Barone, R, Barone, Y, Bartoli, F, Bergamini, C, Bertolini, F, Bolognesi, S, Bordone, A, Bortolaso, P, Bugliani, M, Calandra, C, Calò, S, Cardamone, G, Caroleo, M, Carra, E, Carretta, D, Chiocchi, L, Cinosi, E, Clerici, M, Corbo, M, Corsi, E, Costanzo, R, Costoloni, G, D’Arienzo, F, Debolini, S, De Capua, A, Di Napoli, W, Dinelli, M, Facchi, E, Fargnoli, F, Fiori, F, Franchi, A, Gardellin, F, Gastaldon, C, Gazzoletti, E, Ghio, L, Giacomin, M, Gregis, M, Iovieno, N, Koukouna, D, Lax, A, Lintas, C, Luca, A, Luca, M, Lussetti, M, Madrucci, M, Magnani, N, Magni, L, Manca, E, Martorelli, C, Mattafirri, R, Paladini, C, Papola, D, Percudani, M, Perini, G, Petrosemolo, P, Pezzullo, M, Piantanida, S, Pinna, F, Prato, K, Prestia, D, Quattrone, D, Reggianini, C, Restaino, F, Ribolsi, M, Rinosi, G, Rizzo, C, Rizzo, R, Roggi, M, Rossi, G, Rossi, S, Ruberto, S, Santi, M, Santoro, R, Sepede, G, Signorelli, M, Soscia, F, Staffa, P, Stilo, M, Strizzolo, S, Suraniti, F, Tavian, N, Tortelli, L, Tosoni, F, Valdagno, M, Zanobini, V, Barbui, C, Haefeli, W, A. D. Meid, I. Bighelli, S. Mächler, G. Mikus, G. Carrà, M. Castellazzi, C. Lucii, G. Martinotti, M. Nosè, G. Ostuzzi, T. Acciavatti, A. Adamo, A. Aguglia, C. Albanese, S. Baccaglini, F. Bardicchia, R. Barone, Y. Barone, F. Bartoli, C. Bergamini, F. Bertolini, S. Bolognesi, A. Bordone, P. Bortolaso, M. Bugliani, C. Calandra, S. Calò, G. Cardamone, M. Caroleo, E. Carra, D. Carretta, L. Chiocchi, E. Cinosi, M. Clerici, M. Corbo, E. Corsi, R. Costanzo, G. Costoloni, F. D’Arienzo, S. Debolini, A. De Capua, W. A. Di Napoli, M. Dinelli, E. Facchi, F. Fargnoli, F. Fiori, A. Franchi, F. Gardellin, C. Gastaldon, E. Gazzoletti, L. Ghio, M. Giacomin, M. Gregis, N. Iovieno, D. Koukouna, A. Lax, C. Lintas, A. Luca, M. Luca, M. Lussetti, M. Madrucci, N. Magnani, L. Magni, E. Manca, C. Martorelli, R. Mattafirri, C. Paladini, D. Papola, M. Percudani, G. Perini, P. Petrosemolo, M. Pezzullo, S. Piantanida, F. Pinna, K. Prato, D. Prestia, D. Quattrone, C. Reggianini, F. Restaino, M. Ribolsi, G. Rinosi, C. Rizzo, R. Rizzo, M. Roggi, G. Rossi, S. Rossi, S. Ruberto, M. Santi, R. Santoro, G. Sepede, M. S. Signorelli, F. Soscia, P. Staffa, M. Stilo, S. Strizzolo, F. Suraniti, N. Tavian, L. Tortelli, F. Tosoni, M. Valdagno, V. Zanobini, C. Barbui, and W. E. Haefeli

Abstract

Background: Whether arrhythmia risks will increase if drugs with electrocardiographic (ECG) QT-prolonging properties are combined is generally supposed but not well studied. Based on available evidence, the Arizona Center for Education and Research on Therapeutics (AZCERT) classification defines the risk of QT prolongation for exposure to single drugs. We aimed to investigate how combining AZCERT drug categories impacts QT duration and how relative drug exposure affects the extent of pharmacodynamic drug–drug interactions. Methods: In a cohort of 2558 psychiatric inpatients and outpatients, we modeled whether AZCERT class and number of coprescribed QT-prolonging drugs correlates with observed rate-corrected QT duration (QTc) while also considering age, sex, inpatient status, and other QTc-prolonging risk factors. We concurrently considered administered drug doses and pharmacokinetic interactions modulating drug clearance to calculate individual weights of relative exposure with AZCERT drugs. Because QTc duration is concentration-dependent, we estimated individual drug exposure with these drugs and included this information as weights in weighted regression analyses. Results: Drugs attributing a ‘known’ risk for clinical consequences were associated with the largest QTc prolongations. However, the presence of at least two versus one QTc-prolonging drug yielded nonsignificant prolongations [exposure-weighted parameter estimates with 95% confidence intervals for ‘known’ risk drugs + 0.93 ms (–8.88;10.75)]. Estimates for the ‘conditional’ risk class increased upon refinement with relative drug exposure and co-administration of a ‘known’ risk drug as a further risk factor. Conclusions: These observations indicate that indiscriminate combinations of QTc-prolonging drugs do not necessarily result in additive QTc prolongation and suggest that QT prolongation caused by drug combinations strongly depends on the nature of the combination partners and individual drug exposure.

Published
2017

2. Prevalence and correlates of QTc prolongation in Italian psychiatric care: Cross-sectional multicentre study

Author

Nosè, M, Bighelli, I, Castellazzi, M, Martinotti, G, Carra', G, Lucii, C, Ostuzzi, G, Sozzi, F, Barbui, C, Acciavatti, T, Adamo, A, Aguglia, A, Albanese, C, Baccaglini, S, Bardicchia, F, Barone, R, Barone, Y, Bartoli, F, Bergamini, C, Bertolini, F, Bolognesi, S, Bordone, A, Bortolaso, P, Bugliani, M, Calandra, C, Calò, S, Cardamone, G, Caroleo, M, Carra, E, Carretta, D, Chiocchi, L, Clerici, M, Corbo, M, Corsi, E, Costanzo, R, Costoloni, G, D'Arienzo, F, Debolini, S, De Capua, A, Di Napoli, W, Dinelli, M, Facchi, E, Fargnoli, F, Fiori, F, Franchi, A, Gardellin, F, Gazzoletti, E, Ghio, L, Giacomin, M, Gregis, M, Iovieno, N, Koukouna, D, Lax, A, Lintas, C, Luca, A, Luca, M, Lussetti, M, Madrucci, M, Magnani, N, Magni, L, Manca, E, Martorelli, C, Mattafirri, R, Percudani, M, Perini, G, Petrosemolo, P, Pezzullo, M, Piantanida, S, Pinna, F, Prato, K, Prestia, D, Quattrone, D, Reggianini, C, Restaino, F, Ribolsi, M, Rinosi, G, Rizzo, C, Rizzo, R, Roggi, M, Rossi, G, Rossi, S, Ruberto, S, Santoro, R, Santi, M, Signorelli, M, Soscia, F, Staffa, P, Stilo, M, Strizzolo, S, Suraniti, F, Tavian, N, Tortelli, L, Tosoni, F, Valdagno, M, Zanobini, V, CARRA', GIUSEPPE, Barbui, C., Di Napoli, WA, Signorelli, MS, Nosè, M, Bighelli, I, Castellazzi, M, Martinotti, G, Carra', G, Lucii, C, Ostuzzi, G, Sozzi, F, Barbui, C, Acciavatti, T, Adamo, A, Aguglia, A, Albanese, C, Baccaglini, S, Bardicchia, F, Barone, R, Barone, Y, Bartoli, F, Bergamini, C, Bertolini, F, Bolognesi, S, Bordone, A, Bortolaso, P, Bugliani, M, Calandra, C, Calò, S, Cardamone, G, Caroleo, M, Carra, E, Carretta, D, Chiocchi, L, Clerici, M, Corbo, M, Corsi, E, Costanzo, R, Costoloni, G, D'Arienzo, F, Debolini, S, De Capua, A, Di Napoli, W, Dinelli, M, Facchi, E, Fargnoli, F, Fiori, F, Franchi, A, Gardellin, F, Gazzoletti, E, Ghio, L, Giacomin, M, Gregis, M, Iovieno, N, Koukouna, D, Lax, A, Lintas, C, Luca, A, Luca, M, Lussetti, M, Madrucci, M, Magnani, N, Magni, L, Manca, E, Martorelli, C, Mattafirri, R, Percudani, M, Perini, G, Petrosemolo, P, Pezzullo, M, Piantanida, S, Pinna, F, Prato, K, Prestia, D, Quattrone, D, Reggianini, C, Restaino, F, Ribolsi, M, Rinosi, G, Rizzo, C, Rizzo, R, Roggi, M, Rossi, G, Rossi, S, Ruberto, S, Santoro, R, Santi, M, Signorelli, M, Soscia, F, Staffa, P, Stilo, M, Strizzolo, S, Suraniti, F, Tavian, N, Tortelli, L, Tosoni, F, Valdagno, M, Zanobini, V, CARRA', GIUSEPPE, Barbui, C., Di Napoli, WA, and Signorelli, MS

Abstract

Aims. In recent years several warnings have been issued by regulatory authorities on the risk of electrocardiogram abnormalities in individuals exposed to psychotropic drugs. As a consequence of these warnings, monitoring of the QT interval corrected for heart rate (QTc) has become increasingly common. This study was conducted to measure the frequency of QTc prolongation in unselected psychiatric patients, and to document the associated factors using a cross-sectional approach. Method. The study was carried out in 35 Italian psychiatric services that are part of the STAR (Servizi Territoriali Associati per la Ricerca) Network, a research group established to produce scientific knowledge by collecting data under ordinary circumstances. During a three-month period, a consecutive unselected series of both in- and out-patients were enrolled if they performed an ECG during the recruitment period and were receiving psychotropic drugs on the day ECG was recorded. Results. During the recruitment period a total of 2411 patients were included in the study. The prevalence of QTc prolongation ranged from 14.7% (men) and 18.6% (women) for the cut-off of 450 ms, to 1.26% (men) and 1.01% (women) for the cut-off of 500 ms. In the multivariate model conducted in the whole sample of patients exposed to psychotropic drugs, female sex, age, heart rate, alcohol and/or substance abuse, cardiovascular diseases and cardiovascular drug treatment, and drug overdose were significantly associated with QTc prolongation. In patients exposed to antipsychotic drugs, polypharmacy was positively associated with QTc prolongation, whereas use of aripiprazole decreased the risk. In patients exposed to antidepressant drugs, use of citalopram, citalopram dose and use of haloperidol in addition to antidepressant drugs, were all positively associated with QTc prolongation. Conclusions. The confirmation of a link between antipsychotic polypharmacy and QTc prolongation supports the current guidelines that re

Published
2016

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