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.
Emedastine Difumarate is a selective histamine H1 receptor antagonist with anti-allergic activity, prescribed for allergic conjunctivitis. Upon ocular administration, emedastine causes a dose-dependent inhibition of histamine-stimulated vascular permeabil
Levocarbastine is a second-generation H1 receptor antagonist for allergic conjunctivitis. It also acts as a potent selective antagonist for the neurotensin receptor NTS2 and is the first drug to be used to characterize different neurotensin subtypes.