What essential information must be included on a prescription label according to Federal Law?

The inclusion of the statement "Caution: Federal law prohibits the transfer of this drug to any person other than the patient for whom it was prescribed" on a prescription label is crucial because it communicates important legal information regarding the controlled status of the medication. This warning is mandatory for controlled substances and reinforces the legal ownership of the medication, emphasizing that only the patient for whom it was prescribed is authorized to use it. This regulation is designed to prevent illegal distribution and misuse of prescription medications, which is a significant concern in pharmaceutical practices.

While other options may contain relevant information, none are required by federal law on a prescription label like this cautionary statement. For instance, while an expiry date, manufacturer's name, and address, or emergency instructions could be helpful or relevant in certain contexts, they do not carry the same legal weight or mandatory requirement as the prohibition against transferring the medication to someone else. This distinction underlines the importance of understanding both the legal and practical aspects of handling prescription medications within pharmacy law.