A member asked:

I took two 50mg tablets of diphenhydramine 17 hours before i had to take a pre-employment oral drug test. is there a chance i might fail the drug test?

A doctor has provided 1 answer
Dr. John Chiu answered

Unlikely: This would not be screened or confused with illegal drugs. However people often get drowsy from this relatively high dose . If you were to fail the test, it would be based on your performance and not the drug itself.

Answered 7/11/2018

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Related Questions

A member asked:

Took 50mg diphenhydramine two hours ago still so sleep can I take another one?

2 doctors weighed in across 2 answers