Hypericin is a photosensitive antiviral with anticancer and antidepressant agent derived from Hypericum perforatum. It can inhibit tyrosine kinases with IC50 of 7.5 μM. IC50: 7.5 uMIn vitro:The photosensitive of hypericin can induce both apoptosis and necrosis in a concentration and light dose-dependent fashion. PDT with hypericin results in the activation of multiple pathways that can either promote or counteract the cell death program. It can effect cytotoxic to tumor cells by visible light.