Depends: The combination of the two medications can cause increased drowsiness. If you have already taken Cetirizine for allergies and need something for breakthrough symptoms, you can use benadryl, (diphenhydramine) but i would not routinely use them together.
Answered 6/17/2015
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3 doctors weighed in across 2 answers
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
A doctor has provided 1 answer
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