This document discusses various drug delivery systems including oral, injection-based, transdermal, carrier-based, and targeted delivery systems. It provides details on properties of responsive drug delivery devices and how they can provide controlled release profiles for sensitive drugs through long-lived, biocompatible designs. Specific examples covered include oral tablets and films, injection methods like dermojet pellets and insulin pens, inhalers, transdermal patches, monoclonal antibodies, liposomes, nanoparticles, and genetic transfer systems. The goal is to improve individualized therapy through controlled release and targeted delivery to increase drug efficacy while reducing side effects.