In an accessible style, this book provides a thorough exami-nation of key concepts. Solubility, stability, rheology, surface & interfacial phenomena, micromeritics, & complexation are some of the basic qualities of drug substances discussed, and understanding them can help formulate medicinal sub-stances into effective dosage forms. Further, the document incorporates the relevant ICH stability testing criteria and offers ideas for applicable practicals. The presentation is intended to inspire independent research because of its ccessible language and emphasis on clarity over brevity.