Alatrol Syrup is an antihistamine medication manufactured by Square Pharmaceuticals Ltd., Bangladesh. Each 5 ml of the syrup contains 5 mg of Cetirizine Hydrochloride, a second-generation antihistamine known for its effectiveness in treating allergic conditions. Cetirizine works by blocking histamine receptors, thereby reducing allergy symptoms such as sneezing, runny or itchy nose, and watery eyes. It is commonly used to alleviate symptoms associated with hay fever (seasonal allergic rhinitis), perennial allergic rhinitis, allergic conjunctivitis, chronic urticaria (hives), and other allergic skin conditions.