A member asked:

Is it safe for me to take 75 mg of benadryl? each pill is 25 mg. what would be my maximum dosage? what is and what is not safe? i'm using it to sleep.

A doctor has provided 1 answer
Dr. John Chiu answered

100 mg?: The margin of safety is quite high although you may end up with dry mouth and even constipation at higher doses. If Benadryl at 100 mg does not put you to sleep, it is unlikely that higher dose would do the job. Consider practicing better sleep hygiene (no bright light exposure a couple of hours prior to sleeping, avoid eating late etc). If problem persists, consult your doctor.

Answered 11/27/2017

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