Overview
Levocetirizine is approved by the U.S. Food and Drug Administration (FDA) to treat chronic idiopathic urticaria, a condition also known as chronic hives. It is used to relieve symptoms such as persistent itching, rash, and discolored, raised welts on the skin. 

Levocetirizine is an antihistamine. It works by blocking the effects of histamine, a natural chemical in the body that causes allergy symptoms. This reduces skin irritation and inflammation.

How do I take it?
Prescribing information states that levocetirizine is available as oral tablets and an oral solution. It is usually taken once daily in the evening, with or without food. Dosing sizes and cadence depend on the age of the person taking the medication. Levocetirizine should be taken exactly as directed by a healthcare provider. 

Side effects
Common side effects of levocetirizine include drowsiness, tiredness, dry mouth, cough, and fever.

Rare but serious side effects may include difficulty urinating and severe allergic reactions such as rash, hives, swelling, and symptoms of ear infections (especially in children). In rare cases, people have reported intense itching after stopping long-term use of levocetirizine.

For more information about this treatment, visit:

Levocetirizine — MedlinePlus

Levocetirizine — Drugs.com