User:Mr. Ibrahem/Levocetirizine

Levocetirizine, sold under the brand name Xyzal among others, is an antihistamine used for the treatment of allergic rhinitis (hay fever) and long term hives of unclear cause. It is less sedating than older antihistamines. It is taken by mouth.

Common side effects include sleepiness, dry mouth, cough, vomiting, and diarrhea. Use in pregnancy appears safe but has not been well studied and use when breastfeeding is of unclear safety. It is classified as a second-generation antihistamine and works by blocking histamine H1-receptors.

Levocetirizine was approved for medical use in the United States in 2007. It is available as a generic medication. A month supply in the United Kingdom costs the NHS about 4.50 £ as of 2019. In the United States the wholesale cost of this amount is about US$3. In 2017, it was the 175th most commonly prescribed medication in the United States, with more than three million prescriptions.