CPS (formerly RxTx) provides access to CPS and CPhA peer-reviewed monographs, therapeutic choices, drug tables/choices, a drug interaction checker, Health Canada advisories and recalls, etc. It is updated weekly.
Lexicomp provides evidence-based referential drug information for pharmacists, physicians, dentists and nurses to confidently make drug decisions for each unique patient, and to support the appropriate and safe use of medications by patients.