Levoser Tablets 5mg (Levocetirizine) - 20 Tablets - Prescription RequiredSuffering from allergies? Levoser Tablets, containing Levocetirizine, are now available at derma. pk, your trusted online pharmacy in Pakistan. But first, you'll need a prescription from your doctor. What is Levocetirizine and how does it work? Levocetirizine is a type of medicine called an antihistamine. It works by blocking a natural substance called histamine that your body makes during an allergic reaction. This helps to relieve symptoms like