This document discusses drug delivery systems for biotechnology products, focusing on stability aspects and monitoring methods to improve stability. It provides background on biotechnology and its history, then describes various routes for delivering biotech products, including orally, nasally, transdermally, parenterally, and rectally. For each route, it discusses technologies being investigated or developed to enhance stability and absorption of biotech drugs, such as using polymers, absorption enhancers, and targeted delivery methods. The goal is to develop delivery systems that can safely and reliably deliver biotech medications at therapeutic levels.