Here is a study[0] which directly contradicts that claim: "Thus, the higher dose of ibuprofen (2400 mg per day) was not superior to either the dose of acetamin

Here is a study[0] which directly contradicts that claim: "Thus, the higher dose of ibuprofen (2400 mg per day) was not superior to either the dose of acetaminophen (4000 mg per day) or the lower dose of ibuprofen (1200 mg per day) for pain relief or improvement of function." http://www.nejm.org/doi/full/10.1056/NEJM199107113250203#t=article http://www.nejm.org/doi/full/10.1056/NEJM199107113250203#t=a...