Ibuprofen is an anti-inflammatory: it blocks pain, fever, AND inflammation at the site, making it the pick for sprains, period cramps, toothache, and arthritis. Acetaminophen works mainly in the brain on pain and fever without touching inflammation - the pick for headaches and general aches, and the safer one with ulcers, kidney problems, blood thinners, or pregnancy.
The risks mirror the mechanisms: ibuprofen threatens the stomach lining and kidneys; acetaminophen threatens the liver in overdose. Ibuprofen goes with food, capped at 1,200 mg a day over the counter; acetaminophen caps at 4,000 mg from all sources. Because they work differently, adults can combine or stagger them for stubborn pain. Pymander is a free AI doctor, 24/7 by text, and can help you pick.
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Common questions
What's the difference between ibuprofen and acetaminophen?
They are both painkillers and fever reducers, but they work differently and carry different risks. Ibuprofen is an NSAID: it blocks the enzymes that produce prostaglandins - the chemicals driving pain, fever, AND inflammation - at the site of the problem. That makes it the better tool when inflammation is the driver: sprains, period cramps, toothache, arthritis, back pain. Acetaminophen (acetaminophen/Tylenol) works mainly in the brain and spinal cord, turning down pain and fever without touching inflammation - so it is the better pick for headaches, general aches, and fever, and the safer pick for people with stomach ulcers, kidney problems, blood thinners, or pregnancy. The risk profiles mirror the mechanisms: ibuprofen can injure the stomach lining (ulcers, bleeding), kidneys, and - with heavy use - cardiovascular risk; acetaminophen's danger is liver damage in overdose, including accidental stacking of products. Practical rules: ibuprofen with food, capped at 1,200 mg a day over the counter; acetaminophen capped at 4,000 mg a day from all sources. And because they work differently, adults can take them together or staggered for stubborn pain - the NHS confirms this. Pymander is a free AI doctor, 24/7 by text, that can help you pick for your situation.