Antivenin is a substance used in the treatment of venomous snake bites that is made from the venom of the same species that bit the person. Synonyms for antivenin include antivenom, venom antiserum, venom antibody, snakebite serum, and snake antitoxin. These terms all refer to a substance that can neutralize the effects of venom in the body. Antivenin is usually administered through injection or infusion and can be highly effective in preventing serious or life-threatening symptoms caused by snake venom. It is important for individuals who spend time in areas where venomous snakes are common to be aware of the availability and use of antivenin as part of proper safety precautions.