A member asked:

I took a allergy pill zyrtek but it doesn't seem to be working. how long can do i have to wait to take some bendryl?

A doctor has provided 1 answer
Dr. Oscar Novick answered

Specializes in Pediatrics

Zyrtec (cetirizine): Try taking zyrtec every 12 hours, if one tablet isn' t working. Less side effects than with benadryl (diphenhydramine).

Answered 9/4/2013

4.9k views

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