Summary
Summary of drug information (MedlinePlusDrug)
Summary of dietary supplement and herbal information (MedlinePlusSupp)
Summary of consumer health information (MedlinePlusTopics)
Summary of HIV/AIDS treatment (AIDSinfo)
Summary of the effect on breastfeeding (LactMed)
Summary of Drug-Induced Liver Injury (LiverTox)
Manufacturers drug label (DailyMed)
Summary of ingredients and label information (Dietary Supplements Labels Database)
Clinical trials (ClinicalTrials.gov)
Drug Identification and Image Display (Pillbox beta)

Detailed Summary
Summary of reviewed biological and physical data (HSDB)
References from scientific journals (Medline/PubMed)
References from toxicological journals (TOXLINE)
Biological activities and chemical structures (PubChem)
Biological activities against HIV/AIDS and other viruses (NIAID ChemDB)
Toxicological and chemical resources (ChemIDplus)

Additional Resources
Information from the US Food & Drug Administration (Drugs@FDA)
Information from the US Drug Enforcement Administration (DEA)
Search engine for other government resources (USA.gov)