Which category of medication is characterized by requiring a prescription before dispensing?

The category of medication characterized by requiring a prescription before dispensing is legend medications. Legend medications are defined by their requirement for a prescription because they are deemed to have a higher potential for misuse or may cause significant side effects if not monitored by a healthcare professional. This regulatory measure is in place to ensure safe and appropriate use under the guidance of a prescriber.

While controlled substances also require a prescription, they are a more specific category under legend medications that are subject to strict regulation due to their potential for abuse. Over-the-counter medications do not require a prescription and can be purchased directly by consumers. Herbal products, on the other hand, typically do not require a prescription either, as they are often considered dietary supplements and regulated differently than prescription medications. Thus, legend medications broadly encompass those requiring a prescription, which includes controlled substances, but is more extensive in its definition.