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Medical Definition of Naphthazoline hydrochloride
1. 2-(1-naphthylmethyl)-2-imidazoline hydrochloride;a sympathomimetic amine, used as a topical vasoconstrictor; available as naphazoline hydrochloride nitrate, with the same uses. Synonym: naphthazoline hydrochloride. (05 Mar 2000)