Antivenom is a medicine that counteracts the poisonous effects of a venomous bite or sting. When a rattlesnake, black widow spider, or scorpion injects venom into someone, antivenom works like a targeted cure, neutralizing the toxins before they can cause serious harm.

Scientists create antivenom through a fascinating process: they inject small amounts of venom into horses or sheep, whose immune systems respond by producing antibodies that fight the venom. These antibodies are then carefully extracted and processed into medicine for humans. It's like training an animal's body to become a living factory for the cure.

Different venoms require different antivenoms. A medicine for rattlesnake bites won't help with cobra venom, which is why hospitals in different parts of the world stock different types. Getting the right antivenom quickly can mean the difference between a full recovery and lasting damage. Doctors who treat snakebite victims need to identify the species correctly to give the proper antivenom.

The word combines anti (meaning “against”) with venom (the toxic substance some animals inject). You might also see it written as antivenin or called an antitoxin, though antivenom is the most common term today.