Zytrec is a prescription antihistamine that I have found to be very effective. It's active ingredient, Cetirizine hydrochloride, is an orally active and selective H1-receptor antagonist. The chemical name is (±) - -1- piperazinyl ethoxy]acetic acid, dihydrochloride. Cetirizine hydrochloride is a racemic compound with an empirical formula of 2HCl. The molecular weight is 461.82

If it wasn't for this stuff I would spend most of the winter curled up in a sneezing ball.

You can learn more about it at www.zyrtec.com

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