NCIt definition : The hydrochloride salt form of oxymetazoline, an imidazole derivative with a direct
acting sympathomimetic property. Oxymetazoline binds to and activates alpha-2 adrenergic
receptors. Upon nasal or ocular administration, oxymetazoline constricts the arterioles
in the nose and eye, resulting in decreased nasal and conjunctival congestion, respectively.;