This document discusses physicochemical and biological considerations in the design of modified release dosage forms. It covers topics like aqueous solubility, partition coefficient, drug stability, protein binding, molecular size and diffusivity, absorption, distribution, metabolism, elimination, biological half-life, and side effects and safety. The document was submitted by a group of 12 pharmacy students at Universal Medical and Business College as an assignment on industrial pharmacy. It references textbooks and websites for its sources.