“To assess the association between medical marijuana laws (MMLs) and the odds of a positive opioid test, an indicator for prior use.
State-specific estimates indicated a reduction in opioid positivity for most states after implementation of an operational MML,
CONCLUSIONS:
Operational MMLs are associated with reductions in opioid positivity among 21- to 40-year-old fatally injured drivers and may reduce opioid use and overdose.”