What is the primary piece of information required on a prepackage?

The primary piece of information required on a prepackage is the expiration date. This is crucial because it informs both the pharmacy and the patient about the timeframe in which the medication is guaranteed to be effective and safe to use. The expiration date ensures that the integrity of the medication is maintained, as the potency can diminish or become unsafe after this date.

In the context of pharmacy, having the expiration date prominently displayed is essential for patient safety and regulatory compliance. It allows pharmacists to manage inventory effectively and helps prevent dispensing potentially harmful expired medications. Therefore, the expiration date serves as a critical indicator for the proper use of the stored pharmaceuticals.

Other details, such as drug price, patient address, and prescription date, while important in different contexts, are not required elements on a prepackage of medication. These details serve other functions, such as billing or patient record-keeping, but they do not directly relate to the safety and efficacy of the medication itself in the same way the expiration date does.