Zyrtec (cetirizine): If you mean "on top" of allegra, (fexofenadine) or in addition to Allegra (fexofenadine) to reduce itching i would recommend zyrtec. Allegra (fexofenadine) in the am and zyrtec at night. Zyrtec may cause drowsiness so be careful.
Answered 11/29/2017
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