Yes: Benadryl (diphenhydramine) a is an antihistamine and can cause drowsiness. Histamine is a neurotransmitter that excites or makes the system alert - so something that blocks it can make the system drowsy.
Answered 6/24/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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