Paliperidone 9mg modified-release tablets

BackgroundProlactin increase is a common and potentially problematic adverse event of antipsychotics. We aimed to discover the relationship between antipsychotic doses and changes in prolactin levels.ObjectiveTo examine the relationship between antipsychotic doses and changes in prolactin levels in adults with acutely exacerbated schizophrenia.MethodsWe searched the Cochrane Schizophrenia Group register (last search 26 July 2024) and previous reviews for fixed-dose, randomized controlled trials (RCTs) that investigated monotherapy of 21 antipsychotics in adults with acutely exacerbated schizophrenia. The primary outcome was mean prolactin change from baseline to study endpoint adopting mean differences (MD) in ng/mL as the effect size measure. The dose-response curves were estimated by conducting random-effects dose-response meta-analyses using the restricted cubic spline method.ResultsAmong 165 eligible studies, 68 studies with 238 dose arms (23,128 participants, 35% female) reported on prolactin and were meta-analyzed. Of these, 94% lasted ≤ 3 months, and 90% of the studies used oral formulations. Participants in one study experienced their first episode, while all other studies also included multiepisode participants. The dose-response curves indicated that with aripiprazole, higher doses were significantly associated with lower prolactin levels than lower doses. Brexpiprazole, cariprazine, lumateperone, and quetiapine carried negligible risks for prolactin increase across examined doses. During treatment with most other antipsychotics, i.e., asenapine, haloperidol, iloperidone, lurasidone, olanzapine, paliperidone, risperidone, and ziprasidone, prolactin levels rose with increasing doses and then continued to increase or plateaued. The shape of the dose-response curves was similar in males and females, with generally larger amplitudes of the curves in females.ConclusionsThe prolactin-increasing property varies among antipsychotics, is dose-related, and is greater in females. These findings in adults with acutely exacerbated schizophrenia can help clinicians titrate and adapt antipsychotic doses and consider patients' sex in treatment decisions. The protocol was registered in the International Prospective Register of Systematic Reviews (PROSPERO); registration no. CRD42020181467.

Abstract licence: CC BY-NC

Background: The primary treatment of schizophrenia is pharmacotherapy with antipsychotic agents, such as risperidone and paliperidone. Population pharmacokinetic (PopPK) modelling plays a crucial role in optimising therapy by predicting of plasma concentrations, therapeutic efficacy, and the risk of adverse effects using model informed precision dosing. Objectives: This systematic review examined the PopPK models of risperidone and paliperidone in patients diagnosed with schizophrenia based on the available scientific evidence. Methods: A systematic review of the health science databases was conducted. The inclusion criteria were original articles published in peer-reviewed journals, studies focusing on the development of original PopPK models of risperidone and paliperidone, and clinical studies. The exclusion criteria were full-text articles that could not be retrieved; studies not including subjects diagnosed with schizophrenia or schizoaffective disorders; and studies that did not investigate risperidone or paliperidone. Results: A total of 19 studies developing PopPK models were analysed, including one- or two-compartment PopPK model structures. Interindividual variability in the pharmacokinetic parameters was shown to be influenced by factors such as CYP2D6 activity, renal function, body mass index, and sex. Parameter estimation revealed high variability in clearance and volume of distribution. Conclusion: Numerous PopPK models for risperidone and paliperidone have been published with a detailed characterisation of absorption, metabolism, and elimination. Therefore, future research should focus on the external validation of these models to facilitate their integration into clinical practice and optimise individualised dosing, ultimately improving treatment efficacy and safety across diverse patient populations.

Abstract licence: CC BY