IP 5mg Levocetirizine Tablets are prescribed for treatment of various allergic symptoms including runny nose, watery eyes, sneezing, hives, & itching. They belong to drug class of non-sedating third generation antihistamines with high bioavailability. Active chemical used in their formulation has molecular formula C21H25ClN2O3 with molar mass of 388.888 g/mol and elimination half life of about 6-10 hours. They are known to work by decreasing activity of histamine H1 receptors thus providing relief from hay fever symptoms. IP 5mg Levocetirizine Tablets get metabolized in liver by CYP3A4 enzyme showing good protein binding ability of about 90%.