Earlier quoted context omitted.
The one month at a time thing is coming from insurance companies not the pharmacy.
Not necessarily. Pharmacies have arbitrary power. My doctor gives me a three month prescription for a scheduled substance and I've had a couple pharmacies reject it because it's "sketchy". Of course, they never offer to call my doctor to confirm anything. They just smirk and cross their arms.
https://www.nbcnews.com/news/us-news/cvs-health-agrees-5b-se...
https://www.npr.org/2021/11/23/1058539458/a-jury-in-ohio-say...
https://www.nytimes.com/2021/11/23/health/walmart-cvs-opioid...