Final answer:
PDR stands for Physicians' Desk Reference, a resource used by healthcare professionals that contains information about prescription drugs, including composition, dosage, safety, and efficacy. It is updated annually with data from drug manufacturers.
Step-by-step explanation:
PDR stands for Physicians' Desk Reference, which is a comprehensive book of prescription drugs used by physicians and healthcare professionals. It contains information about the composition, dosage, safety, and efficacy of medications based on manufacturer submissions. To ensure accuracy and reliability, drug manufacturers must submit detailed drug information to the PDR, which includes clinical trial data, potential side effects, and recommended usage guidelines. Healthcare providers use the PDR as a reference to help make informed prescribing decisions and to consider any potential drug interactions or contraindications when treating patients. It is important to note that the PDR is primarily used in the United States and may be updated annually to reflect new information about medications.