Abstract
In this paper, GastroPlus™ modelling was applied to the development of a low-dose poorly water-soluble compound. The initial input parameters for simulation of solution were based on solubility, log D, permeability, and the dose together with dose volume of 250 ml. Typical physiology input parameters were used in simulation. Simulated curves were compared with clinical data for solution, and input parameters were optimized. Using the optimized input parameters from solution, simulated AUC curves of tablets of various strength (1mg, 3mg, and 5mg) were obtained and compared with solution AUC curves as well as clinical AUV curves, from which PK parameters were derived. Predictability of absorption of various dose was discussed for both tablet and solution. Furthermore, impact of dose, pH, and food effect on absorption was explored based on the simulated data. Overall, this case study demonstrated the use of GastroPlus™ in the drug development for a low-dose compound.
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