How much Tylenol will hurt a dog?

Quote from the Related Link: "Dogs, particularly small dogs, can also experience significant tissue damage from as little as two regular strength acetaminophen tablets. Signs of distress can appear quickly, especially if the dose is repeated, including salivation, vomiting, weakness, and abdominal pain." It is not recommended to give any animal a medicine that is for humans without a veterinarian prescribing it for the animal.