Skip main navigation


Search info


Expiration Dates


A drug's expiration date is the date at which the drugs potency decreases to approximately 85% of its original strength. This expiration is determined by aging studies at elevated temperatures, in a specific package that is unopened. These are guidelines set by the United States Pharmacopeia for all manufacturers of drugs in the U.S. It is a requirement for the manufacturer to label its product with an expiration date.

Once a medication has been dispensed in a light and moisture resistant vial by your pharmacy, common practice is to give this drug an expiration of one year. It is not recommended to take a medication past its expiration date; some breakdown of the drug may occur.

Back to Ask a Pharmacist


Answers to questions regarding information about medications or health conditions are not for diagnostic or treatment purposes and are not conclusive as to the presence or absence of any health condition. Consult your physician for diagnosis and treatment of your medical condition. The information provided is not a substitute for medical advice. Advances in medicine may cause this information to become outdated, invalid or subject to debate. Professional opinions and interpretations of the scientific literature may vary. Walgreens' terms of use and general warranty disclaimer apply to all services provided. If you are in need of immediate medical attention, contact your physician, poison control center or emergency medical professional. If you need to speak with a pharmacist for non-emergency matters, contact your local Walgreens pharmacist or call a pharmacist toll-free at 1 (877) 250-5823.

Balance Rewards for Healthy Choices

20 Points
20 Points

Now you can track your blood pressure and blood glucose.

Start earning points Go Arrow