Sometimes studies are full of bad data. Sometimes they are just based on stupid ideas. Here's one that manages to incorporate both flaws. Should elderly people with broken ribs be given Tylenol in pill form or IV for pain? Perhaps a salami sandwich is a better offering ... since this study is full of baloney.
Summary: In the mad dash to remove opioids from modern life, some researchers are willing to try anything, even Tylenol to control pain. How well does IV Tylenol work for post-operative pain from spinal surgery? Although the data are not complete, it's safe to say that it's no better than moose urine.
Just what we don't need: Another anti-opioid (pro-pain) zealot spreading the false gospel. But we have one anyhow and his name is Jerome Adams, M.D, the U.S. Surgeon General. Adams cites a 2015 paper -- from an emergency department in Tehran, Iran as evidence! -- that IV Tylenol works as well as morphine. Too bad the paper doesn't say that. Or anything else either.