A member asked:

How effective is the allergy medicine called xyzal (levocetirizine)?

A doctor has provided 1 answer

Xyzal (levocetirizine): It is an isomer of zyrtec (cetirizine). It is about equally effective to zyrtec (cetirizine) but might cause slightly less drowsiness. Both work pretty much the same. I say....Buy whichever is cheaper.

Answered 3/6/2014

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