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.
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
Posted 6 Mar 2010 • 1 answer
Posted 1 May 2010 • 1 answer
Posted 15 Jan 2013 • 1 answer
Posted 22 Sep 2015 • 2 answers
Posted 10 Dec 2016 • 1 answer