A member asked:

Sleep medications: how long does it take for "zzzquil" to work?

A doctor has provided 1 answer
Dr. Michael Zacharisen answered

Specializes in Allergy and Immunology

Variable: While the onset of action of Diphenhydramine (active ingredient in zzzquil) is less than 10 minutes, the peak effect is more like 60-90 minutes.

Answered 3/20/2020

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