What is "naphazoline"

n. 2-(1-naphthylmethyl)-2-imidazoline hydrochloride, a sympathomimetic agent used as a vasoconstrictor.

n. vasoconstrictor (trade names Privine and Sudafed) used in nasal sprays to treat symptoms of nasal congestion and in eyedrops to treat eye irritation [syn: Privine, Sudafed]

Naphazoline (in the hydrochloride form) is the common name for 2-(1-naphthylmethyl)-2-imidazoline hydrochloride. It is a sympathomimetic agent with marked alpha adrenergic activity. It is a vasoconstrictor with a rapid action in reducing swelling when applied to mucous membrane. It acts on alpha-receptors in the arterioles of the conjunctiva to produce constriction, resulting in decreased congestion. It is an active ingredient in several over-the-counter formulations including Clear Eyes and Naphcon eye drops.

It has the molecular formula CHN and a molar mass of 246.73 g/mol.