Source:http://linkedlifedata.com/resource/umls/id/C0027373
MSH: An adrenergic vasoconstrictor agent used as a decongestant.,NCI: An imidazole derivative and a direct-acting sympathomimetic amine with vasoconstrictive activity. Upon ocular administration, naphazoline exerts its effect by acting on alpha-adrenergic receptors in the arterioles of the conjunctiva to produce vasoconstriction, resulting in decreased conjunctival congestion and diminished itching, irritation and redness.