the Drug Information Portal by the NLM
DRUG INFORMATION PORTAL, is a good portal to know. It gives healthcare professionals and researchers a gateway to current, accurate and understandable drug information from the National Library of Medicine and other key government agencies (MedlinePlus, Drugs@FDA, ClinicalTrials.gov, Toxline, etc.).
More than 12,000 drug records are available for searching:
My Opinion: the delivered information is not as completed as some paid tools (Scopus, Pharmapendium, TrialTrove, etc.) but it is a very good start page to get a first overview for a drug: Usage, Indications, adverse effects , FDA documents (doesn’t link to EMEA approvals documents), clinical trials, toxicity extensive bibliography, etc.