Is Xyzal an antihistamine?

Xyzal is the brand name for levocetirizine, which is a true antihistamine, specifically a second-generation H1 antihistamine. It works by blocking histamine at H1 receptors, the pathway responsible for allergy symptoms like sneezing, runny and itchy nose, itchy, watery eyes, and hives. Levocetirizine is closely related to cetirizine (Zyrtec) and is the more active component of that molecule.\n\nAs a second-generation antihistamine, Xyzal was designed to cause less sedation than older first-generation drugs like diphenhydramine (Benadryl). However, among the newer antihistamines it sits toward the more sedating end. It is slightly more likely to cause drowsiness than loratadine (Claritin) or fexofenadine (Allegra), which is why it is often recommended to be taken in the evening. Most people tolerate it well, but everyone responds differently.\n\nXyzal is used for both seasonal and year-round allergic rhinitis and for chronic hives. It is available over the counter, typically as a once-daily tablet or oral solution, providing about 24 hours of relief. Follow the label dosing, avoid combining it with alcohol or other sedatives, and check with a clinician if you have kidney problems, since the dose may need adjusting.\n\nAs with every antihistamine, Xyzal does not treat anaphylaxis. A severe allergic reaction involving breathing trouble, throat swelling, or fainting is a life-threatening emergency that requires epinephrine and immediate emergency care, not an oral allergy tablet.