Levocetirizine Dihydrochloride is the anti-allergic medicine used for the treatment of allergy symptoms like watery eyes, runny nose, itching eyes/nose, sneezing, hives, and itching. This medicine works by blocking a certain natural substance (histamine) developed by the body during an allergic reaction. The dosage of the medicine depends on the condition & age of the patient and should be taken as prescribed by the doctor. Some mild and temporary side effects like Drowsiness, tiredness, headache, sleepiness or dry mouth may occur.