Limazocic is a cyclic disulfide compound newly synthesized as a hepatoprotective agent. It has a protective effect against both chronic liver injuries induced by carbon tetrachloride (CCL) and swine serum and several chemically induced acute liver injuries. The inhibitory effects of limazocic on immunologically induced liver injuries in mice have also been demonstrated and furthermore, limazocic has been shown to have immunomodulatory effects such as induction of cytotoxic cell activities and modulation of interleukin-2 and interferon-gamma production. Limazocic had a markedly inhibitory effect on ANIT-induced intrahepatic cholestasis in rats. Limazocic suppresses VEGF production and reduces vascular leakage and the growth of mouse experimental choroidal neovascularization.