Bilacrest M Tablet is the combination of two medications. It is used to treat a variety of allergy disorders. Bilacrest M Tablet relieves allergy symptoms such a clogged or runny nose, sneezing, and itchy or watery eyes caused by seasonal hay fever (allergic rhinitis), seasonal allergies, or allergies. It works by decreasing specific chemicals in the body that cause allergic reactions. Bilacrest M Tablet decreases airway edema and relieves asthma symptoms.