• Int. J. Clin. Pract. · Jun 2018

    Maintenance dose conversion between oral risperidone and paliperidone palmitate 1 month: Practical guidance based on pharmacokinetic simulations.

    • Alberto Russu, Kern Sliwa Jennifer J Janssen Scientific Affairs, LLC, Titusville, NJ, USA., Paulien Ravenstijn, Arun Singh, Maju Mathews, Edward Kim, and Srihari Gopal.
    • Janssen Research & Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium.
    • Int. J. Clin. Pract. 2018 Jun 1; 72 (6): e13089.

    AimWe assessed the dosage strengths of paliperidone palmitate 1-month (PP1M) long-acting injectable resulting in similar steady-state (SS) exposures to the dosage strengths of oral risperidone using pharmacokinetic (PK) simulations.MethodsPopulation PK simulations of SS PK were performed using the PK models of oral risperidone and PP1M. The concentrations of active moiety (risperidone + paliperidone) from risperidone were compared to paliperidone concentrations resulting from PP1M administration. Similarity was assessed via graphical evaluation of median and 90% prediction intervals of SS PK profiles over 28 days.ResultsOral risperidone doses of 1, 2, 3, 4, and 6 mg/d are expected to result in similar SS PK as PP1M doses of 25, 50, 75, 100, and 150 mg eq. (which correspond to 39, 78, 117, 156, and 234 mg of paliperidone palmitate) respectively (ie 25-fold dose conversion factor from oral risperidone to PP1M).ConclusionsThis study provides clinicians with a practical guidance to establish suitable maintenance dose levels of PP1M and oral risperidone when transitioning patients from one formulation to another.© 2018 The Authors. International Journal of Clinical Practice Published by John Wiley & Sons Ltd.

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