See also individual listings under Drug Monographs
Cytochrome P450 Drug Interaction Table
Medscape DrugInfo (Free registration required)
CERTs (Centers for Education & Research on Therapeutics) - conduct research and provide education that will advance the optimal use of drugs
See also individual listings under Drug Monographs
Health Canada MedEffect Adverse Reaction Information
MedWatch: The FDA Safety Information and Adverse Event Reporting Program
The Institute for Safe Medication Practices (ISMP)