There's a body of research showing that painkiller abuse and overdose are lower in states with medical marijuana laws. These studies have generally assumed that when medical marijuana is available, pain patients are increasingly choosing pot over powerful and deadly prescription narcotics. But that's always been just an assumption.
Democracy Dies in Darkness
One striking chart shows why pharma companies are fighting legal marijuana
July 13, 2016 at 10:01 a.m. EDT