A Single-Dose, Open-Label, Parallel, Randomized, Dose-Proportionality Study of Paliperidone After Intramuscular Injections of Paliperidone Palmitate in the Deltoid or Gluteal Muscle in Patients With Schizophrenia.

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A Single-Dose, Open-Label, Parallel, Randomized, Dose-Proportionality Study of Paliperidone After Intramuscular Injections of Paliperidone Palmitate in the Deltoid or Gluteal Muscle in Patients With Schizophrenia.

J Clin Pharmacol. 2014 Mar 27;

Authors: Cleton A, Rossenu S, Crauwels H, Berwaerts J, Hough D, Gopal S, Eerdekens M, Vandebosch A, Remmerie B, De Meulder M, Fernández CM

Abstract
Paliperidone palmitate (PP) is a long-acting injectable (LAI) antipsychotic, developed for monthly intramuscular (i.m.) administration into deltoid/gluteal muscle, approved for the treatment of schizophrenia in many countries. To assess the options for i.m. injection sites, dose-proportionality of PP was investigated after injection of a single dose (25-150 mg eq.) of PP in either gluteal (n = 106) or deltoid (n = 95) muscle of schizophrenic patients. Overall, mean (geometric) area under plasma concentration-time curve from time zero to infinity (AUC∞ ) of paliperidone increased proportionally with increasing PP doses, regardless of injection site. Mean maximum plasma concentration (Cmax ) was slightly less than dose-proportional for both injection sites at PP doses >50 mg eq. Mean Cmax was higher after injection in the deltoid compared with the gluteal muscle, except for the 100 mg eq. dose, while AUC∞ for both injection sites was comparable at all doses. Median time to reach Cmax (tmax ) ranged from 13-14 days after deltoid and 13-17 days after gluteal injection across all doses. Single PP injections in deltoid and gluteal muscles in the dose range of 25-150 mg eq. were generally tolerable both locally and systemically.

PMID: 24676998 [PubMed - as supplied by publisher]

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