Levocil Tablets 500mgProduct Overview Product Form: Tablet Pack Size: 10 Tablets Prescription Required: Yes Levocil Tablets 500mg Levocil Tablets 500mg are a potent antihistamine medication designed to alleviate symptoms associated with allergies, such as sneezing, runny nose, and itchy eyes. Each tablet contains Levocetirizine dihydrochloride as the active ingredient, which works by blocking the action of histaminea substance in the body that causes allergic symptoms.