What is commonly referred to as "Prescription Drugs" as per the Durham-Humphrey Amendment?

The term commonly referred to as "Prescription Drugs" as per the Durham-Humphrey Amendment is "Legend Drugs." This classification originated from the amendment, which distinguished prescription medications from over-the-counter (OTC) drugs. The amendment established a framework that requires certain medications to be dispensed only with a prescription from a licensed healthcare provider, highlighting the importance and specific requirements associated with these drugs.

Legend Drugs are those that are labeled with the statement "Caution: Federal law prohibits dispensing without a prescription" or its equivalent. This designation indicates that these medications may only be dispensed following a valid prescription, emphasizing the need for professional guidance in their use due to potential risks, side effects, or the complexity of treatment regimens involved.

By contrast, OTC Drugs are available without a prescription, controlled substances fall under a different regulatory framework due to their high potential for abuse, and non-prescription medications are also available without the need for a healthcare provider's oversight. Therefore, the distinctive characteristics and regulatory requirements of Legend Drugs set them apart as the correct answer in relation to the Durham-Humphrey Amendment's definition of prescription drugs.