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.
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
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
My doctor prescribed cheratussin ac for coughing at night, also have sinus congestion which Zyrtec D was recommended. Have recently undergone surgury ...
1 answer • 2 Dec 2010
I was prescribed this medication for allergies. I am undergoing Allergy Therapy right now. My running nose and postnasal drip worsen after the ...
2 answers • 18 Jan 2011
can we use them for same purpose ?
1 answer • 15 Jan 2013