@laura-f probably has to do with all of the fines and money that had to be paid out because of Big Pharma pushing it... and it being so addictive.
https://www.npr.org/2022/02/25/1082901958/opioid-settlement-johnson-26-billion
On the Oxy topic, adderall ... my daughter has been on it for three years for her ADHD, and the past few months it has been very hit or miss whether she can get the prescription filled on time. It's a multi-pronged problem: during covid, there were people suddenly working from home and being home all day with their kids, and discovering that either a) they are having a hard time concentrating, or b) their kids are more than they can handle so they just assume it's ADHD. My daughter's psychiatrist said that thankfully, insurance companies are now requiring in-person meetings to re-up prescriptions for things like adderall, because so many people were put on it without any real diagnosis, and many of those people and children will likely be taken off of it, but it will take quite some time to get through everyone. For now, we fight monthly to get what she needs. And fun side note: our insurance also decided to stop covering it because it isn't "preventative," even though it literally prevents her from flunking out of school and cutting herself.