Cetipen-10 Tablet is used to treat allergies, such as hay fever (seasonal allergic rhinitis), round-the-year dust or pet allergies (perennial allergic rhinitis), and urticaria (swelling, redness, and itchiness of the skin). Cetipen-10 Tablet contains cetirizine (an antihistamine), which blocks the effects of a chemical messenger known as histamine, which is naturally involved in allergic reactions. It helps relieve allergy symptoms like a blocked/runny/itchy nose, red/watery eyes, and skin rashes.