Acetaminophen, also known as paracetamol, is an analgesic (pain reliever) and fever-reducing medication. It is used to treat pain and fever in dogs. It is used “off label” or “extra label” in some avian species, rabbits, miniature pigs, and some rodent species. Acetaminophen comes in capsule, tablet, or liquid suspension form. NEVER USE in cats or ferrets as it is potentially fatal at even miniscule doses.