Drug Design, Volume IV covers the pharmaceutical phase of drug action, with emphasis on those aspects that are of importance in the design of optimally effective drug products. The book discusses biopharmaceutics as a basis for the design of drug products; the types and pharmacokinetics of peroral prolonged action dosage forms and parenteral prolonged action forms; and the design of topical drug products. The text also describes physical-chemical parameters which affect the bioavailability of topical drug products; the design of sunscreen preparations; as well as the clinical application of litholytic agents, which are preventive and curative drugs for nephrolithiasis. The design of biologically active nucleosides and of insecticidal chlorohydrocarbon derivatives is also encompassed. Chemists, biochemists, pharmacologists, and people involved in drug design will find the book invaluable.