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A member asked:
Benadryl (diphenhydramine) knocks me out, will zyrtec do the same?
A doctor has provided 1 answer
Less likely: Although Zyrtec can cause drowsiness in 10-15% of the people, it is likely to cause much less drowsiness than Benadryl (diphenhydramine) which is often used as a sleep-aid in OTC medications.
Answered 4/23/2018
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