Simple Evaluation Method of Intrinsic Diffusivity for Membrane-Moderated Controlled Release

Abstract

The effect of diffusion boundary layers in an in vitro membrane permeation system on the membrane diffusivity of drugs was investigated based on the three-layer model. A simple method for evaluating the intrinsic diffusivity through the membrane was developed and the intrinsic diffusivity of progesterone and testosterone through a silicone membrane were determined using this approach.