Paracetamol Toxicity in Cats

Paracetamol toxicity in cats occurs when a cat is exposed to paracetamol (acetaminophen), a common pain reliever used in human medicine. Cats lack the enzyme pathways that other species use to break down this medication safely, so even small amounts can cause serious harm. The drug damages red blood cells and, in many cases, the liver, leading to a cascade of effects throughout the body. Owners most often arrive at this page after a cat has been given paracetamol by mistake, has found and eaten a tablet, or is showing unexplained signs such as brown-coloured gums, difficulty breathing, or a swollen face in a household where paracetamol is present. The signs can appear within hours or may take a day or more to become obvious, depending on the dose. This page explores the patterns an owner might observe, what is happening inside the body when paracetamol is absorbed, how the condition is investigated, and the approaches that exist to support affected cats.