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.
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My kids never complained about taking Zyrtec. Now that it's in the plastic bottle, they swear it tastes terrible. I e-mailed the company twice ...
1 answer • 30 Nov 2009
my three year old hads had hives and joint swelling from an allergic reaction to unknown at this time. she was perscribed zyrtec and became unable to ...
1 answer • 6 Mar 2010
Is xyzal different enough from zyrtec to make a difference, or will his system be too used to the active ingredient?
1 answer • 1 May 2010
can we use them for same purpose ?
1 answer • 15 Jan 2013