The primary outcome was cumulative postoperative opioid consumption (measured in intravenous morphine milligram equivalent [MME] per day) over a period of 72 hours. Secondary outcomes included VAS ...

Since 2019, xylazine, a powerful animal tranquilizer, started appearing in street fentanyl. It has since spread throughout the United States, including in 99% of the street fentanyl in Philadelphia, a ...