olopatadine

noun
olo·​pat·​a·​dine | \ ˌō-lō-ˈpat-ə-ˌdēn How to pronounce olopatadine (audio) \

Medical Definition of olopatadine

: an antihistamine administered in the form of its hydrochloride C21H23NO3·HCl as eye drops for the treatment of itching associated with allergic conjunctivitis

Note: Olopatadine is marketed under the trademarks Pataday and Patanol.