Picked a few choice paragraphs for info, this isn't the entire article.

More than 40% of street drug samples tested in Rhode Island contained the animal tranquilizer xylazine, according to a new analysis out of Brown University. It’s the latest sign that the drug, which causes sedation and can lead to skin infections and overdoses, is continuing to spread through the illicit drug supply in the United States.
Xylazine, often referred to as "tranq," concerns public health experts because it causes such heavy sedation, which can leave people exposed and vulnerable for long stretches of time. It’s not an opioid, so Naloxone — which can help treat opioid overdoses — doesn’t work to reverse its effects. Xylazine has become increasingly involved in overdose deaths in the U.S.
The drug was common recreationally in Puerto Rico and then started showing up in Philadelphia in the early 2010s, Shover said. For the last decade, it’s been mostly confined to Philadelphia, she noted. Over the past few years, it started appearing in other places — like in Massachusetts and New York City.

Anyone know more about this drug? Curious as to what the draw is considering it's not an opioid, is it something more like Ketamine? I'd have to guess a cheap, accessible drug like that could certainly do some damage, although not sure how many people would go with that over something like heroin/fent.