Although the official compendia define a drug substance as to identity, purity, strength, and quality, they
normally do not provide other physical or chemical data, nor do they list methods of synthesis or pathways of physical
or biological degradation and metabolism. Such information is scattered throughout the scientific literature and
the files of pharmaceutical laboratories. Edited by the Associate Director of Analytical Research and Development
for the American Association of Pharmaceutical Scientists, Analytical Profiles of Drug Substances and Excipients
brings this information together into one source. The scope of the series has recently been expanded to include
profiles of excipient materials.