Due to modern lifestyles and environmental factors, more and more people are struggling with allergic symptoms, whether from pollen, house dust, or pet dander. To manage allergic reactions, various medications are available, among which cetirizine and xyzal (levocetirizine) are the most common. These antihistamines can effectively reduce allergic symptoms such as sneezing, runny nose, and itching. Cetirizine: Effects, Uses, and Side Effects Cetirizine is a second-generation antihistamine primarily used to treat allergic rhinitis and urticaria. Its mechanism of action lies in blocking histamine H1 receptors, helping to reduce symptoms caused by allergic reactions. When exposed to allergens, the body releases histamine, which is responsible for inflammatory responses; cetirizine inhibits this…