A member asked:

Does klonopin (clonazepam) (or any benzo) ever really expire, i.e. lose potency over time? in other words is it just as effective 20 years past expiration date?

A doctor has provided 1 answer
Dr. Pamela Pappas answered

Specializes in Psychiatry

20 years?: 20 years is way too long to rely on the potency of the listed dose on the bottle. Some medicines can still be active a year after their expiration date, but i wouldn't trust if after that. Lots happens with heat. Light, moisture, etc. For a more detailed answer, please ask your pharmacist.

Answered 7/11/2018

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