Medical Dictionary

promethazine

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noun pro·meth·a·zine \(ˈ)prō-ˈmeth-ə-ˌzēn\

Medical Definition of promethazine

  1. :  a crystalline antihistamine drug derived from phenothiazine and used chiefly in the form of its hydrochloride C17H20N2S·HCl—see phenergan


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