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A member asked:
I take zyrtec but it doesn't always keep my symptoms at bay. i took allegra once and it seemed to help should i switch back?
A doctor has provided 1 answer
OTC allergy drugs: The commonly used over-the-counter allergy drugs Zyrtec, Allegra, and Claritin help relieve allergy symptoms but don't completely get rid of one's allergy symptoms. A patient usually can pick which of the 3 medications to use, according to which one she thinks works best for her. She can switch among them, but should take one of them for 5-7 days to see its full effect develop, before switching.
Answered 2/25/2018
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