Naphazoline Hydrochloride

**Semantic type:** Pharmacologic Substance

**Definition:** The hydrochloride salt form of naphazoline, an imidazole derivative and a direct-acting sympathomimetic amine with vasoconstrictive properties. Upon ocular administration, naphazoline hydrochloride exerts its effect by acting on alpha-adrenergic receptors in the arterioles of the conjunctiva to produce vasoconstriction, resulting in decreased conjunctival congestion and diminished itching, irritation and redness.

**Synonyms:** - 1H-Imidazole, 4,5-dihydro-2-(1-naphthalenylmethyl)-, Monohydrochloride - 2-(1-Naphthylmethyl)-2-imidazoline Hydrochloride - Albalon - NAPHAZOLINE HYDROCHLORIDE - Nafazair - Opcon - Vasocon