Effect on humans
Although powerful enough to paralyze smaller animals,[4] the venom is not lethal to humans. However, it produces excruciating pain that may be intense enough to incapacitate the victim. Swelling rapidly develops around the entry wound and gradually spreads outward. Information obtained from case studies shows that the pain develops into a long-lasting hyperalgesia that can persist for months but usually lasts from a few days to a few weeks.[5][9] A clinical report from 1992 showed that the severe pain was persistent and did not respond to morphine.
In 1991, Keith Payne, a former member of the Australian Army and recipient of the Victoria Cross (Australia's highest award for valour) was struck on the hand by a platypus spur, while trying to rescue the stranded animal. He described the pain as worse than being struck by shrapnel. One month later he was still experiencing pain in that hand. In 2006, Payne reported discomfort and stiffness when carrying out some physical activities, such as using a hammer.
There have been no reported human fatalities