Independent side-by-side comparison.
Neither is universally "better" — for everyday fever and common aches they're roughly interchangeable, so the right pick depends on whether you need anti-inflammatory action and which side-effect risks (stomach/kidney/heart vs. liver) apply to you.
They are different drugs with the same everyday job but one core difference: ibuprofen is an NSAID that reduces inflammation/swelling, while Tylenol (acetaminophen) relieves pain and fever but, per MedlinePlus, "does not relieve inflammation." Their safety risks differ: NSAIDs like ibuprofen can cause stomach upset or ulcers and can affect the kidneys and heart, whereas acetaminophen's main danger is liver harm from too high a dose (the commonly cited adult ceiling is 4 grams/day).
Choose ibuprofen when swelling or inflammation is part of the problem — e.g., a muscle sprain or strain, or arthritis — since MedlinePlus says NSAIDs "reduce swelling from arthritis or a muscle sprain or strain" and are "often most effective if you have pain and inflammation." For plain fever, headache, or toothache, either is fine.
Choose Tylenol (acetaminophen) when you want to avoid NSAID risks — for example if you have a stomach ulcer or a heart or kidney concern, or if you're pregnant or breastfeeding. The NHS says ibuprofen "can cause more side effects than paracetamol" and that "if you can take paracetamol, it's a good idea to try it before taking ibuprofen," and that paracetamol "is usually the best painkiller to use" in pregnancy and while breastfeeding.
Similar for everyday fever and pain — pick by the specifics, not by a winner. Reach for ibuprofen when inflammation/swelling is involved; reach for Tylenol if you need to avoid stomach/kidney/heart risks or are pregnant/breastfeeding. Per the NHS, adults can take the two together if one alone isn't enough, but it's reasonable to try each on its own first. Whichever you use, respect the daily limits — too much acetaminophen can harm the liver, and don't take ibuprofen longer than directed because of stomach and kidney risks. If you have a chronic condition, take other medicines, or are pregnant, ask a pharmacist or doctor.
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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.