Skip to Content

What is the difference between Xyzal and Zyrtec? What is the Levo?

Responses (1)

Marvell 9 Nov 2009

Xyzal (levocetirizine) is the R-enantiomer of cetirizine, and is thus as such not a new compound, but part of an already known preparation. Cetirizine consists of equal parts R- and S-enantiomer, but several studies have shown that the pharmacological effect – a selective inhibitory effect on the peripheral H1 receptors – is induced by the R-enantiomer alone.

Xyzal tablets contain 5 mg levocetirizine, which corresponds to the content of active R-enantiomer in one 10 mg cetirizine tablet.

http://www.irf.dk/en/reviews/xyzal_levocetirizine.htm

wvdustbunny 10 Nov 2009

So, in layman's terms, Xyzal is only one part of zyrtec. So, if Xyzal works for me, then zyrtec should also work and zyrtec is over the counter, right? Thank you for your help.

Hottr 19 days ago

Levocetirizine is non drowsy as per other websites is that really true in users experiences?

Hottr 19 days ago

Levocetirizine (as levocetirizine dihydrochloride) is a third-generation non-sedative antihistamine, developed from the second-generation antihistamine Cetirizine

Further Information

Search for questions

Still looking for answers? Try searching for what you seek or ask your own question.

Similar Questions