Many of the TOXNET databases have information on prescription and nonprescription drugs. There are two starting points that can help you locate the best resource for you:
1. ChemIDplus links to all NLM databases that have information on a particular drug. It also links to material from federal, state and international agencies.
2. The Drug Information Portal is a gateway to drug information from the National Library of Medicine and other key government agencies. It covers drugs from entry into clinical trials through entry in the market place.