Cetrizine Tablet is an antihistamine used to treat various allergic conditions such as hay fever, conjunctivitis and skin reactions. It can cause drowsiness, dry mouth, and other side effects. Learn about its dosage, interactions, safety advice, and alternatives. Cetirizine is a second generation antihistamine that reduces the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. Cetirizine is used to treat cold or allergy symptoms such as sneezing, itching, watery eyes, or runny nose. Find out how cetirizine treats symptoms of allergies and how to take it. NHS medicines information on cetirizine – what it's used for, side effects, dosage and who can take it. Cetrizine is used for Allergic eye disease, Nasal allergy symptoms, Allergic conditions. Know it’s uses, side effects, reviews, composition and precautions only on 1mg.