system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - How does anti venom work?
gpt
You might not like this... antivenom is assorted antibodies that target the venom in your bloodstream. You make it by taking the venom from the snake with the venom, then injecting it in an animal, then harvesting the resulting antibodies from blood drained from the animal.

This is different from antidotes used against toxins, which tends to be more specific. The opioid antidote naloxone for example "knocks" the opioid receptor free and takes the place of the opioid for a short time.