Panadol is a brand of paracetamol (called acetaminophen in the US) used to relieve pain and reduce fever. It treats a wide range of everyday pain types, including headaches, muscle aches, period pain, toothache, migraine, sinus pain, and arthritis discomfort. It also brings down high temperatures caused by colds, flu, and other infections.
Common Uses
Panadol is one of the most widely used over-the-counter pain relievers in the world, and its range of applications is broad. The conditions it’s most commonly taken for include:
- Headaches and tension headaches
- Migraine
- Muscle aches and back pain
- Period pain
- Toothache
- Sinus pain
- Arthritis pain
- Cold and flu symptoms, including fever
It’s considered a first-line choice for mild to moderate pain. For conditions like osteoarthritis, a slow-release version called Panadol Osteo contains 665 mg of paracetamol per tablet and is designed to provide longer-lasting relief for persistent joint and muscle pain.
How Panadol Works in Your Body
For decades, scientists knew paracetamol reduced pain but weren’t entirely sure how. Recent research published in the Proceedings of the National Academy of Sciences has clarified the picture. After you swallow a Panadol tablet, your liver breaks the paracetamol down into a smaller molecule. That molecule travels through your bloodstream and, inside your cells, gets converted into a compound called AM404.
AM404 works by blocking pain-sensing nerve channels, specifically the sodium channels that fire in response to injury or inflammation. It essentially quiets the electrical signals those nerves send to your brain. The effect is potent at very low concentrations, which helps explain why a standard dose of paracetamol can noticeably dull pain without the anti-inflammatory punch of drugs like ibuprofen. This mechanism is similar to how local anesthetics work, though paracetamol’s effect is milder and spread throughout the body rather than concentrated in one spot.
A single dose typically starts working within 30 to 45 minutes and provides relief for 4 to 6 hours.
Dosage for Adults and Children
For adults and children aged 12 and over, the recommended dose is 500 to 1,000 mg every four to six hours as needed. The absolute maximum in any 24-hour period is 4,000 mg, which equals eight standard 500 mg tablets. Going above this threshold raises the risk of serious liver damage.
For children between 1 month and 12 years old, the dose is based on weight: 15 mg per kilogram of body weight, given every four to six hours, with no more than four doses in 24 hours. Children’s Panadol comes in liquid form to make weight-based dosing easier. Always use the measuring syringe or cup provided rather than estimating.
Safety During Pregnancy and Breastfeeding
The American College of Obstetricians and Gynecologists (ACOG) considers paracetamol the safest first-line pain reliever and fever reducer during pregnancy. Some headlines in recent years raised concerns about a possible link between prenatal paracetamol use and neurodevelopmental issues in children. ACOG reviewed this evidence in 2025 and concluded that current data do not support a causal connection. No change in clinical practice was recommended.
That said, the guidance is to use the lowest effective dose for the shortest time necessary. Leaving conditions like fever or migraine untreated during pregnancy carries its own risks to both mother and baby, so avoiding paracetamol entirely isn’t the safer path when you genuinely need it.
Who Should Be Cautious
Panadol is safe for most people at recommended doses, but certain groups need to take extra care. You should check with a doctor or pharmacist before taking it if you have liver problems, kidney problems, or if you regularly drink more alcohol than recommended guidelines. People who are very underweight may need a lower dose.
Alcohol use deserves particular attention. A 2021 study of patients who overdosed on paracetamol found that alcohol abuse was a significant risk factor for developing liver toxicity. Even at normal doses, heavy drinking puts extra strain on the same liver pathways that process paracetamol, so the margin of safety narrows.
The Hidden Risk of Double-Dosing
The most common way people accidentally take too much paracetamol is by not realizing it’s in multiple products they’re using at the same time. Paracetamol is an ingredient in many cold and flu medicines, migraine preparations, combination painkillers (like paracetamol-ibuprofen products), and some prescription medications. If you take Panadol on top of one of these, you can easily exceed the safe daily limit without knowing it.
Before taking Panadol, check the active ingredients list on every other medicine you’re currently using. If any of them contain paracetamol or acetaminophen, don’t add Panadol on top.
Interactions With Other Medications
Paracetamol has relatively few drug interactions compared to anti-inflammatory painkillers, which is one reason it’s so widely recommended. The most notable interaction is with warfarin, a blood-thinning medication. Long-term paracetamol use can increase warfarin’s effect, raising the chance of bleeding. If you take warfarin regularly and need ongoing pain relief, your doctor may want to monitor your blood clotting levels more frequently.