Levocitrizine

Levocetirizine is a third-generation non-sedative antihistamine indicated for the relief of symptoms associated with seasonal and perennial allergic rhinitis and uncomplicated skin manifestations of chronic idiopathic urticaria. It was developed from the second-generation antihistamine cetirizine. Levocetirizine is the R-enantiomer of the cetirizine racemate. Levocetirizine is an inverse agonist that decreases activity at histamine H1 receptors. This in turn prevents the release of other allergy chemicals and increased blood supply to the area, and provides relief from the typical symptoms of hay fever. It does not prevent the actual release of histamine from mast cells. Levocetirizine was approved by the United States Food and Drug Administration on May 25, 2007 and is marketed under the brand XYZAL® by sanofi-aventis U.S. LLC.

Major and minor side effects  for levocetirizine are Sleepiness, Headache Blurred vision, Runny Nose and Cough, Dry mouth, Diarrhea, Nausea or Vomiting, Difficulty in passing urine.Contact your doctor immediately if any of these symptoms are experienced on a regular basis.

Levocetirizine is indicated for the relief of symptoms associated with allergic rhinitis (seasonal and perennial) in adults and children 6 years of age and older.