The venom of the Sri Lankan Green Pit viper is hemotoxic. The bite of a Sri Lakan Green Pit viper is very painful, when someone is bitten by a Sri Lankan Green Pit viper the bitten area swells up, and the pain may last for a few days. The cells of living tissue die, blisters occur, and ptosis and lymphadenopathy take place. However, there have been no reports on deaths.