Martindale: The Complete Drug Reference
Martindale content is available via Micromedex 2.0 (link provided above). Information on drugs in clinical use worldwide, as well as selected investigational and veterinary drugs, herbal and complementary medicines, pharmaceutical excipients, vitamins and nutritional agents, vaccines, radiopharmaceuticals, contrast media and diagnostic agents, medicinal gases, drugs of abuse and recreational drugs, toxic substances, disinfectants, and pesticides.
From Micromedex 2.0: Click on the "Tox and Drug Product Lookup" tab at the top of the page and then select the "Martindale Global Drug" tab above the search box. Search for a drug of interest.