 Drop for drop, massasauga venom is more potent than that of many larger species of rattlesnakes, but due to the lower yield (the amount it is capable of delivering in a single bite), its potential for harm is greatly reduced.It is not considered to be deadly, but the venom is a powerful cytotoxic venom that can cause swelling, necrosis, damage to the skin, and severe pain.Medical treatment should be sought immediately for any venomous snake bite.