Which piece of information is NOT required on drug labels?

The information that is not required on drug labels is the patient's medical history. Drug labels generally contain essential information that is relevant for the safe and effective use of the medication, including the expiration date, which indicates the last date the drug is guaranteed to be effective. Dosage instructions inform the patient on how much of the medication to take and the frequency of administration, which is crucial for treatment efficacy and safety. The name of the manufacturer provides accountability and quality assurance regarding the drug's production.

In contrast, the patient's medical history is not included on drug labels as this information varies from individual to individual and is typically recorded in separate medical documentation. This ensures that patients receive privacy and that pharmaceutical companies do not incorporate specific personal health details that would not be relevant on the drug's packaging.