Levocetirizine is an antihistamine medication that is commonly used to relieve symptoms associated with allergic conditions. It is the active enantiomer of cetirizine and belongs to the second-generation antihistamine class.
Levocetirizine is available over-the-counter. In the United States, see brand name Xyzal.
Key points:
Action: Levocetirizine works by blocking the action of histamine, a natural substance in the body that is involved in allergic reactions. It acts as a selective antagonist at the histamine H1 receptor.
Indications: Levocetirizine is used for the relief of symptoms associated with allergic conditions, including allergic rhinitis (hay fever), chronic idiopathic urticaria (chronic hives), and allergic conjunctivitis.
Forms: It is available in various forms, including oral tablets and oral solutions.
Timing: Levocetirizine generally has a rapid onset of action, and its effects can last for 24 hours. It is often taken once daily.
Side Effects: Common side effects may include drowsiness, dry mouth, headache, or fatigue. Most people tolerate levocetirizine well, and serious side effects are rare.
Effect on Cognitive Function: Levocetirizine is considered a non-sedating antihistamine, meaning it is less likely to cause sedation compared to some other antihistamines. However, individual responses may vary, and caution is advised, especially when performing activities that require mental alertness.