pro·​meth·​a·​zine (ˈ)prō-ˈmeth-ə-ˌzēn How to pronounce promethazine (audio)
: a crystalline antihistamine drug derived from phenothiazine and used chiefly in the form of its hydrochloride C17H20N2S·HCl see phenergan

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Cite this Entry

“Promethazine.” Medical Dictionary, Merriam-Webster, Accessed 14 Jul. 2024.

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