promazine

noun
pro·​ma·​zine | \ ˈprō-mə-ˌzēn How to pronounce promazine (audio) \

Medical Definition of promazine

: a tranquilizer derived from phenothiazine that is administered in the form of its hydrochloride C17H20N2S·HCl and is used similarly to chlorpromazine — see sparine