How does ibuprofen help to treat arthritis differently from acetominophen?

Somewhat better. Ibuprophen is anti-inflammtory has well as being a pain reliever. Acetominophen is a pain reliever but has no effect on inflammation. While neither is all you should be taking for an inflammatory arthritis. Both can be used in degenerative arthritis, but their is some inflammation exist in this condition too! go iwth the ibuprophen or naproxen. Remember, either can also be taken with tylenol!