What is the PDR?

The PDR, or “Physicians’ Desk Reference,” is the most widely used physician/prescriber resource for drug information, and is found in nearly all doctors’ offices, clinics, hospitals, and health care settings nationwide. The PDR is the primary means by which manufacturers fulfill their “duty to warn” prescribers regarding drug details and safety issues, and is the drug information source most routinely cited in drug-related litigation

Link: http://www.pdrnetwork.net/faq.html