The compilation ofdnnlyticcil Profiles of Drug Szibstunces to supplement the information contained in the official compendia is now a well-established activity. That we are able to publish one voluine per year is a trilxite to the diligence of the editors to solicit articles and even more so to the enthusiastic re- sponse of our authors, an international group associated with pharmaceutical firms, academic institutions, and coinpendial authorities. I would like to ex- press my sincere gratitude to them for making this venture possible.