Abstract
Purpose
To compare the pharmacokinetics of intravenous (IV), oral immediate-release (IR) and oral modified-release (MR) formulations of mavoglurant in healthy subjects, and to assess the food effect on the MR formulation’s input characteristics.
Methods
Plasma concentration-time data from two clinical studies in healthy volunteers were pooled and analysed using NONMEM®. Drug entry into the systemic circulation was modelled using a sum of inverse Gaussian (IG) functions as an input rate function, which was estimated specifically for each formulation and food state.
Results
Mavoglurant pharmacokinetics was best described by a two-compartment model with a sum of either two or three IG functions as input function. The mean absolute bioavailability from the MR formulation (0.387) was less than from the IR formulation (0.436). The MR formulation pharmacokinetics were significantly impacted by food: bioavailability was higher (0.508) and the input process was shorter (complete in approximately 36 versus 12 h for the fasted and fed states, respectively).
Conclusions
Modelling and simulation of mavoglurant pharmacokinetics indicate that the MR formulation might provide a slightly lower steady-state concentration range with lower peaks (possibly better drug tolerance) than the IR formulation, and that the MR formulation’s input properties strongly depend on the food conditions at drug administration.
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Abbreviations
- BQL:
-
Below the quantification limit
- BW:
-
Actual bodyweight
- CL:
-
Plasma clearance
- IG:
-
Inverse Gaussian
- IMPMAP:
-
Monte Carlo importance sampling method assisted by mode a posteriori with interaction
- IR:
-
Immediate-release
- ISV:
-
Intersubject variability
- IV:
-
Intravenous
- mGluR5:
-
Metabotropic glutamate receptor 5
- MR:
-
Modified-release
- OFV:
-
Objective function minimum value
- Q:
-
Inter-compartmental clearance
- Vc:
-
Volume of distribution of the central compartment
- Vp:
-
Volume of distribution of the peripheral compartment
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ACKNOWLEDGMENTS AND DISCLOSURES
The authors thank Nikolaos Tsamandouras (Manchester Pharmacy School, The University of Manchester, Manchester, United-Kingdom), for providing technical support including the methodology on the use of the logistic-normal distribution; Andres Olivares-Morales (Manchester Pharmacy School, The University of Manchester, Manchester, United-Kingdom) for the invaluable discussions on absorption mechanisms; Subramanian Ganesan (Drug Metabolism and Pharmacokinetics, Novartis Institutes for Biomedical Research, Hyderabad, India) for the useful discussions on mavoglurant pharmacokinetics.
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Wendling, T., Ogungbenro, K., Pigeolet, E. et al. Model-Based Evaluation of the Impact of Formulation and Food Intake on the Complex Oral Absorption of Mavoglurant in Healthy Subjects. Pharm Res 32, 1764–1778 (2015). https://doi.org/10.1007/s11095-014-1574-1
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DOI: https://doi.org/10.1007/s11095-014-1574-1