https://khn.org/news/use-of-buprenorphine-to-treat-opioid-addiction-proliferates-in-california/

California and others are expanding MAT for the treatment of OUD, although contriversial in some parts of the county it is showing some impact. 

"...Buprenorphine and methadone are both opioids. Both reduce cravings for heroin and synthetic opioids while minimizing withdrawal symptoms. But buprenorphine is less potent and less likely to result in fatal overdoses than methadone. California doctors have more flexibility in prescribing it than with methadone or naltrexone, another medication used to treat addiction."