A member asked:

For what length of time do the side effects of nyquil last?

A doctor has provided 1 answer
Dr. David Martin answered

Specializes in ENT - Head & Neck Surgery

Effects of NyQuil: The half-life of doxylamine (the time it takes for your body to get rid of half of the drug) is 6-12 hours. The vast majority should be gone within about 24 hours.

Answered 8/18/2016

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