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A 30-year-old member asked:

What can u take if benadryl (diphenhydramine) makes you drowsy?

1 doctor answer4 doctors weighed in
Dr. Richard Wasserman
Allergy and Immunology 44 years experience
Benadryl (diphenhydramine) drowsiness: If Benadryl (diphenhydramine) makes you drowsy, use a less sedating antihistamine like allegra, zyrtec or claritin.

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A 37-year-old member asked:

How long does it take for Benadryl (diphenhydramine) to make you drowsy?

1 doctor answer2 doctors weighed in
Dr. Tammi Schlichtemeier
Pediatrics 31 years experience
About 45 minutes: Benadryl (diphenhydramine) can make some people drowsy. The maximum effect occurs in about 45 minutes or so. However, it can result in hyperalertness in some people.
New York, NY
A 21-year-old male asked:

I take 2 25mg benadryl (diphenhydramine) but i get to drowsy can i take 1 & a half?

2 doctor answers3 doctors weighed in
Dr. David Houghton
Specializes in Internal Medicine and Pediatrics
Sure: Usually Benadryl (diphenhydramine) and its generic equivalent comes in a capsule which can't be split, but you could always empty the capsule and only take half the contents. You can also try just 1 capsule or use the liquid form. 10ml of liquid contains 25mg.

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Last updated May 29, 2018

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