Not denying that acetaminophen/paracetamol has a horrible therapeutic index, but there are reasons why it is still so widely used. Despite potential hepatoxicity, it is considered the safest pain relief drug (this emerging research notwithstanding)
Ibuprofen is not better in every way. For instance ibuprofen, as well as other NSAIDs, is much less gentle on gastrointestinal tract and puts much more strain on kidneys.
Some people (e.g. with inflammatory bowel diseases or renal diseases) do not tolerate NSAIDs well, which is why acetaminophen is on the same step of analgesic ladder - it is still considered better in some cases.
Both are also used complementary to each other in pediatrics.
Great paper! Sorry to nitpick, because your approach is right, but one important detail is wrong - you are not reading what NIH said, but simply a paper made by someone that NIH provides access to. It is important to remember that things on pubmed can be wrong, or subjective and biased.
See header "As a library, NLM provides access to scientific literature. Inclusion in an NLM database does not imply endorsement of, or agreement with, the contents by NLM or the National Institutes of Health.", and you can click on "Author information" to learn more about the authors.
Being able to swipe over the equation instead of tapping would improve playability a lot! Also I sometimes feel like the first tap is not registered right after the new MN appears.
Ibuprofen is not better in every way. For instance ibuprofen, as well as other NSAIDs, is much less gentle on gastrointestinal tract and puts much more strain on kidneys.
Some people (e.g. with inflammatory bowel diseases or renal diseases) do not tolerate NSAIDs well, which is why acetaminophen is on the same step of analgesic ladder - it is still considered better in some cases. Both are also used complementary to each other in pediatrics.