What term is used for drugs available by prescription only?

The term used for drugs that are available by prescription only is "Legend Drugs." This classification stems from the requirement that these medications can only be dispensed with a licensed healthcare provider’s prescription. The designation "legend" relates to the statement on the label of these drugs indicating that they are only to be used under the supervision of a healthcare professional.

This system is meant to ensure that certain medications, which may have significant effects, require professional oversight for their safe usage, reducing the risks of misuse or harmful side effects. Legend Drugs can include a wide range of medications, from antibiotics to high blood pressure medicines.

Other terms mentioned relate to different categories of medications. Over-the-counter (OTC) drugs can be purchased without a prescription and are deemed safe for use without professional guidance. Controlled substances refer to drugs that have a potential for abuse or dependency and are regulated by law, but not all controlled substances are necessarily prescribed only. Generic drugs are simply the non-branded versions of medications, which can be either prescribed or available OTC, depending on their classification.