Carbinoxamine, an anticholinergic and antihistamine agent, is used for hay fever, angioedema, vasomotor rhinitis, mild urticaria, dermatographism and allergic conjunctivitis. It is a histamine antagonist, specifically an H1-antagonist.
Dexbrompheniramine is an antihistamine with anticholinergic properties. It is used to treat allergic diseases such as hay fever or urticaria. It can compete with histamine for H1 receptor sites on effector cells of the gastrointestinal tract, blood vessel