Independent side-by-side comparison.
Neither is universally "better" — they are different drugs for overlapping jobs: Advil (ibuprofen) is an anti-inflammatory NSAID, while Tylenol (acetaminophen) is a pain/fever reducer that is not described as reducing inflammation, so the right choice depends on your symptom and your health history.
They are NOT the same drug and work differently. Per MedlinePlus, Advil's ibuprofen is an NSAID that "works by stopping the body's production of a substance that causes pain, fever, and inflammation" — so it reduces inflammation. Tylenol's acetaminophen "works by changing the way the body senses pain and by cooling the body" and is not characterized as anti-inflammatory. Their main risks also differ: per the MedlinePlus (NIH) NSAID warning, ibuprofen can cause stomach ulcers/bleeding and a higher risk of heart attack or stroke, whereas acetaminophen's main danger is liver damage from too high a dose or with heavy alcohol use.
Consider Advil (ibuprofen) when inflammation or swelling is part of the problem — e.g. sprains and strains, joint or muscle pain, arthritis, toothache, or period pain — since acetaminophen is not described as targeting inflammation. The NHS says ibuprofen is not suitable if you have a stomach ulcer (or have had one), asthma or allergies, an NSAID/aspirin allergy, a heart, liver or kidney condition, problems with blood clotting, or if you're pregnant or trying to get pregnant — in those situations the sources steer away from NSAIDs.
Consider Tylenol (acetaminophen) for general aches, headache, or fever, especially if you have a sensitive stomach, ulcers, or heart/kidney concerns that make NSAIDs risky. The NHS says paracetamol is usually the best painkiller to use if you're pregnant or breastfeeding, and notes that "Ibuprofen can cause more side effects than paracetamol. If you can take paracetamol, it's a good idea to try it before taking ibuprofen." Stay within 4,000 mg/day from all sources and be cautious with alcohol to protect your liver (MedlinePlus advises not taking it if you drink three or more alcoholic drinks every day).
There's no single winner — they're roughly comparable for everyday pain and fever, so pick by the situation: the NHS suggests trying paracetamol (Tylenol) first if you can take it, and it's usually the preferred choice in pregnancy/breastfeeding and for people who must avoid NSAIDs, while ibuprofen (Advil) has the edge when inflammation or swelling is involved. This is general information, not a personal medical recommendation; read each product's Drug Facts label and ask a pharmacist or doctor about your own health conditions and other medicines.
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Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.