Final answer:
Only the name of a drug may be required on a prescription label in cases of over-the-counter medications, which do not necessitate prescription details since they have been approved by the FDA as safe for consumer-directed use.
Step-by-step explanation:
Regulations for non-controlled prescription drug labels typically require that they include several elements such as the name of the patient, the name of the prescribing physician, and the purpose of the medication, unless the prescriber specifically requests that the purpose not be included. However, there could be situations where only the name of the drug is required on the label. For instance, it is a possibility with over-the-counter (OTC) medications, where the drug has already been deemed "safe and effective when used as directed" by the FDA and does not require a prescription. In such situations, OTC medications may not need to list the prescribing physician or patient's name and may display only the name of the drug alongside usage instructions and safety information. Strict adherence to FDA regulations is essential to ensure the safety and efficacy of medications.