Naphazoline (Naphthazoline) nitrate is an α-adrenergic receptor agonist. Naphazoline nitrate reduces vascular hyperpermeability and promotes vasoconstriction. Naphazoline nitrate reduces the levels of inflammatory factors (TNF-α, IL-1β and IL-6 ), cytokines ( IFN-γ and IL-4 ), IgE , GMCSF, and NGF. Naphazoline nitrate can be used for non-bacterial conjunctivitis research .