Which information must be included on drug labels that are distributed?

The correct answer is the expiration date because it is a critical piece of information that ensures the safety and efficacy of the drug throughout its use. Including the expiration date on drug labels helps veterinarians and pet owners understand the timeframe within which the drug should be used for optimal effectiveness. After the expiration date, the chemical composition of the drug may degrade, leading to a reduction in its potency or potentially causing harm if the drug is used beyond this date.

This detail is particularly important in veterinary medicine, where the health and wellbeing of animals depend on the medications administered. By following regulations that mandate the inclusion of the expiration date on drug labels, it helps ensure that animals receive treatment that is both safe and effective.

In contrast, while the list of similar drugs, price of the drug, and veterinary staff history may be relevant in certain contexts, they are not universally required elements on drug labels. They do not directly pertain to the safety, efficacy, or proper usage of the drugs themselves in the way that the expiration date does. This highlights the importance of adhering to specific labeling requirements that prioritize patient safety in veterinary practices.