What is a guide that provides information on prescription drugs available in the United States?

The Physician's Desk Reference (PDR) is widely recognized as a comprehensive resource that provides detailed information about prescription drugs available in the United States. It serves as a reference for healthcare professionals, offering critical data such as indications, dosing guidelines, potential side effects, interactions, and contraindications for various medications. This makes it a valuable tool for ensuring proper medication management and patient safety in clinical practice.

While the FDA Guidelines provide regulatory information regarding drug approval and safety standards, they do not serve as a direct reference guide for healthcare providers looking for detailed drug information. The Drug Enforcement Administration focuses on the regulation and enforcement of controlled substances, but it does not provide a comprehensive overview of all prescription drugs. The National Formulary, while it does include drug formulations and quality standards, is primarily concerned with official drug names and their characteristics but is not as detailed or user-friendly as the PDR for prescribing information. Therefore, the PDR stands out as the correct reference guide for prescription medications in the United States.