Chlorphenamine (Mervilar) 2.5mg/5ml Syrup is an antihistamine (H1 receptor antagonist) used to relieve symptoms of allergies such as sneezing, runny nose, itchy or watery eyes, and itching of the throat or nose. It is also effective in treating hay fever, urticaria (hives), and other allergic conditions. Each 60ml bottle is intended for oral use, as prescribed by a healthcare provider.