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Author: Admin | 2025-04-28
It is no longer good.Re-Packaged DrugsIn terms of drugs that have been repackaged (e.g. pharmacy dispensing into a prescription vial), a major regulatory body for pharmacy in the United States, known as USP, recommends no more than a one-year expiration date for drugs that are not in their original, unopened package.This is because re-packaged drugs (not in the original bottle) don't have the light protection and moisture-absorbing qualities as pharmacy prescription vials do. All in all, your Benadryl (diphenhydramine) probably isn't bad or harmful, just not as effective.Final WordsTo sum everything up, Benadryl past its expiration date likely won't harm you (from the drug itself). There have been no reports of expired Benadryl causing harm and there is no indication that it breaks down into harmful components.However, and this is an important point, it may not be as effective as it once was.If you are relying on Benadryl to help reduce the symptoms of an allergic reaction, it would be prudent to have an 'in-date' product so you know it will have its stated potency and work as intended.
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