Mount B 20 mg/10 mg Numerous allergic disorders are treated with tablets. The Mount B 20mg/10mg Tablet relieves the symptoms of seasonal hay fever (allergic rhinitis), allergies, and seasonal hay fever, including runny or clogged nose, sneezing, and itchy or watery eyes. It functions by lowering specific chemicals in the body that cause allergic reactions. The Mount B 20mg/10mg Tablet relieves asthma symptoms and lessens airway edema.