Levocetrin Syrup is given to children to treat a wide range of symptoms caused due to allergic conditions like hay fever, urticaria (hives), conjunctivitis (red, itchy eye), and common cold. These symptoms may include watery eyes, runny nose, sneezing, and itching.Levocetrin Syrup may make you feel less sleepy as compared to other antihistamine medicines. If you are taking it to prevent getting symptoms you should use it regularly to get the most benefit.