Cannabis and the impact on opioids is one of the more consistent substance use disorder findings from the lit (maybe the one true impact).

Unfortunately, it doesn’t really translate into meaningful reductions (or consistently found reductions) in overdose death rates from opioids. Or admissions to the hospital with opioids detected as a primary substance.

The bigger question is the links between other SUD’s and cannabis, most of which rely on shoddy, preclinical studies.