Search the PBPK Model Repository

Quickly find freely available drug and population models in our PBPK model repository.

The models provided have been collated from published examples which authors have shared in our Published Model Collection or developed as part of various global health projects in our Global Health Collection. This search facility searches both model collections simultaneously.

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Found 136 Matches

Brand Name(s) include: Crixivan

Disease: HIV

Drug Class: Protease inhibitor

Date of Review: 2020

Number of Models Reviewed: 1

Number of Models added to the Repository: 1

The model at-a-glance

 Publication

Ke AB, Nallani SC, Zhao P, Rostami-Hodjegan A, Unadkat JD. A PBPK Model to Predict Disposition of CYP3A-Metabolized Drugs in Pregnant Women: Verification and Discerning the Site of CYP3A Induction. CPT Pharmacometrics Syst Pharmacol. 2012 Sep 26;1(9):e3.

 Simcyp Version

V13

 Published Model Application

Prediction of exposure in pregnancy

 Absorption Model

First Order

 Volume of Distribution Details

Full PBPK

 Route of Elimination

  • CYP3A4 and renal clearance
    • Nonlinear CYP3A4 kinetics

 Perpetrator DDI

  • None 

 Advantages and Limitations

  • Model developed in healthy volunteers to simulate indinavir PK in pregnant women.
  • Can simulate iv and oral data.
  • Verified in healthy subjects and pregnant women in the third trimester.
  • FmCYP3A4 not verified with clinical data.

 Model Compound Files

  • v18_res_indinavir_simcyp_ke

Brand Name(s) include: Kaletra (fixed dose combination with low dose ritonavir)

Disease: HIV

Drug Class: Protease inhibitor

Date of Review: 2020

Number of Models Reviewed: 1

Number of Models added to the Repository: 1

The model at-a-glance

 Publication

Wagner et al., Physiologically-Based Pharmacokinetic Modeling for Predicting the Effect of Intrinsic and Extrinsic Factors on Darunavir or Lopinavir Exposure Co-administered with Ritonavir. J Clin Pharmacol. 2017 October ; 57(10): 1295–1304.  (FDA model)

 Simcyp Version

V13

 Absorption Model

First-Order 

 Volume of Distribution Details

Minimal PBPK

 Route of Elimination

  • CYP3A4 and renal clearance

 Perpetrator DDI

  • CYP3A4 time-dependent inhibitor
  • CYP3A5 time-dependent inhibitor

 Advantages and Limitations

  • Model developed to predict the impact of hepatic impairment on lopinavir PK.
  • Accurately replicates 400 mg dose (therapeutic dose). Overprediction of 200 mg dose and underprediction of 800 mg single dose.
  • DDI with ritonavir works with ritonavir file published in V18, but not the updated V19 file.
  • Perpetrator DDI not verified.

 Model Compound Files

  • v13_res_lopinavir_simcyp_wagner
  • v13_res_ritonavir_simcyp_wagner
Cholesterol_4beta-hydroxycholesterol_RES_V23_Simcyp_240930

The 4β-hydroxycholesterol (4β-OHC) file is an endogenous biomarker for CYP3A activity mainly measured to evaluated potential CYP3A induction in vivo. 4β-OHC file was developed as a primary metabolite of parent compound, cholesterol. 


This document provides: 
1. Examples of model performance
2. A summary of the key pharmacokinetic features of cholesterol and 4β-OHC considered within the model

Cidofovir_V12R1_FDA_20150709
Table 1 of main text, further discussion in supplemental file. Clarification: the value of intrinsic CL for hepatic elimination (0.41) is for undefined human liver microsomes according to retrograde calculation, with a unit of uL/min/mg. The operating hepatic CLint is driven by S9, which has a value of 0.13, obtained from sensitivity analysis to match HLM value above. This clarification will be informed to the journal.

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