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A member asked:
Is there a difference between zyrtec and xyzal (levocetirizine)?
A doctor has provided 1 answer
Not much: Zyrtec is a mixture of two mirror image drugs, levo and dextrocetirizine. Xyzal is a pure levocetirizine. Only the levo form is an active antihistamine. The dextro form is inactive but has no known side effects. The difference is cost, insurance coverage, and patient prejudice or preference.
Answered 4/26/2017
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