Compendium of Pharmaceuticals and Specialties (CPS)

This is a Canadian publication produced by the Canadian Pharmacists Association. It's considered the standard reference for drug information in Canada. The CPS contains information about drugs approved for use in Canada, including detailed monographs for drugs, vaccines, and natural health products, clinical tools, product images, and a comprehensive directory of pharmaceutical manufacturers. It provides details about drug interactions, side effects, dosing information, pharmacology, and more. It's published annually to ensure the inclusion of new medications and recent research. 

 This is a U.S.-based publication, which was traditionally used as a drug reference book. The PDR includes FDA-approved prescribing information (or package inserts) for drugs marketed in the United States. The information includes detailed descriptions of drug activity, dosage and administration information, contraindications, potential side effects, and more.