Alcon Naphcon-A is a dual-action OTC ophthalmic solution combining naphazoline hydrochloride (decongestant) and pheniramine maleate (antihistamine) to address allergic conjunctivitis symptoms. Naphazoline rapidly reduces ocular vasodilation and redness through selective vasoconstriction, while pheniramine antagonizes histamine-mediated itching and lacrimation. This synergistic formulation provides prompt relief from...