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A 71-year-old male asked:

is it safe to take 100mg of diphenydramine hci?

1 doctor answer1 doctor weighed in
Dr. Donald Colantino
Internal Medicine 61 years experience
High dose: The average dose is 25to50mg but 100mg, while not dangerous, can cause sleepiness and excessive drying of mucus membranes. Less common are slower urination in men and possible aggravation of glaucoma. Of course it will potentiate the effects of other sedating medications.

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Chicago, IL
A male asked:

I have a question about Diphenhydramines ?

2 doctor answers2 doctors weighed in
Dr. Richard Bensinger
Ophthalmology 52 years experience
Ask away: If you have a question about diphenhydramines, this site would be a good place to find the answer. Your next step would be to ask the question.

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Last updated Jan 16, 2014
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