http://www.fda.gov/cder/Offices/DDI/pathfinder.htm
Center for Drug Evaluation and Research, U.S. Food and Drug Administration
Drug approvals, purchasing drugs on the Internet, clinical trials, dietary supplements, over-the-counter (OTC) drugs, generic drugs, drug safety--all of these are found on this pathfinder. It's an entry page for drug information from the FDA's Center for Drug Evaluation and Research.