A member asked:

How quickly does it take for bendryl to wear off?

A doctor has provided 1 answer
Dr. Al Hegab answered

Specializes in Allergy and Immunology

Benadryl (diphenhydramine): diphenhydramine has a half life of 4-10 hours, so probably 8-20 hours for it to be cleared from your system

Answered 7/19/2015

2.5k views

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