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PBPK Absorption Modeling of Food Effect and Bioequivalence in Fed State for Two Formulations with Crystalline and Amorphous Forms of BCS 2 Class Drug in Generic Drug Development

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Abstract

Prediction of the effect of food on drug’s pharmacokinetics using modeling and simulation could cause difficulties due to complex in vivo processes. A generic formulation with amorphous form of BCS 2 class drug substance was developed and compared in vitro and in vivo to the reference drug product with drug substance in crystalline form. In order to approve generic formulation, some regulatory agencies are requesting to perform bioequivalence (BE) studies also in fed state. Food can have various effects on drug dissolution and absorption, depending also on drug’s properties. A physiologically based pharmacokinetic (PBPK) absorption model was built in GastroPlus™ to predict the food effect on generic and reference formulation and to predict the fed BE study outcome. During model development, we were searching for model inputs that impact and describe in vivo behavior of amorphous and crystalline forms of active pharmaceutical ingredient (API) in fast and fed conditions. The developed model was able to predict the food effect with up to 10% prediction error (PE). Performed virtual BE trials confirmed the BE of drug products in fed state. Our model was able to capture the difference between the two drug products containing different forms of API (amorphous and crystalline) and predict the food effect on both formulations.

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Acknowledgments

The authors would like to acknowledge coworkers in Sandoz for conducting experiments, sharing data, and valuable consultations regarding modeling.

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Authors and Affiliations

  1. Faculty of Pharmacy, University of Ljubljana, Aškerčeva cesta 7, 1000, Ljubljana, Slovenia

    Jereb Rebeka, Žakelj Simon & Kristl Albin

  2. IVIVC Group, Sandoz Development Center, Ljubljana, Slovenia

    Opara Jerneja, Legen Igor, Petek Boštjan & Bajc Aleksander

Authors
  1. Jereb Rebeka
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  2. Opara Jerneja
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  6. Žakelj Simon
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  7. Kristl Albin
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Correspondence to Jereb Rebeka.

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BE studies were performed for regulatory submission and were conducted in full accordance with the principles stated in the International Conference on Harmonization, Good Clinical Practice guidelines, and the Declaration of Helsinki.

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The authors declare that they have no conflicts of interest.

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Rebeka, J., Jerneja, O., Igor, L. et al. PBPK Absorption Modeling of Food Effect and Bioequivalence in Fed State for Two Formulations with Crystalline and Amorphous Forms of BCS 2 Class Drug in Generic Drug Development. AAPS PharmSciTech 20, 59 (2019). https://doi.org/10.1208/s12249-018-1285-8

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