Acetaminophen
How it eases pain and lowers fever without reducing inflammation, and why the maximum dose is not negotiable.
No apaga la inflamación de raíz como el ibuprofeno, pero engaña al cerebro bajando el volumen central del dolor.
Acetaminophen (paracetamol) is one of the most widely used medicines in the world, and one of the least understood. It does not travel to the place that hurts: it acts mainly on the central nervous system, where it lowers the production of prostaglandins, the substances that amplify the pain signal and turn up the body’s thermostat during a fever.
That is why it relieves pain and brings fever down, but does not reduce inflammation the way ibuprofen and other anti-inflammatories do. All of the drug is processed in the liver, and that is where its risk lies: above the maximum daily dose a toxic metabolite builds up and can cause serious liver damage. Keeping to the dose —and checking that it is not repeated across several cold and flu products at once— is the rule that keeps it safe.
