Not necessary: Allertec contains Cetirizine (zyrtec) which is a very good new generation antihistamine. Benadryl (diphenhydramine) is an older antihistamine that doesn't last as long and has more side effects. Likely the main issue with using both together at usual doses would be drowsiness, fatigue and delayed reaction time.
Answered 9/26/2017
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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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