Christopher Ingraham writes in the Washington Post that a new study shows that painkiller abuse and overdose are significantly lower in states with medical marijuana laws and that when medical marijuana is available, pain patients are increasingly choosing pot over powerful and deadly prescription narcotics. The researchers "found that, in the 17 states with a medical-marijuana law in place by 2013, prescriptions for painkillers and other classes of drugs fell sharply compared with states that did not have a medical-marijuana law... In medical-marijuana states, the average doctor prescribed 265 fewer doses of antidepressants each year, 486 fewer doses of seizure medication, 541 fewer anti-nausea doses and 562 fewer doses of anti-anxiety medication. But most strikingly, the typical physician in a medical-marijuana state prescribed 1,826 fewer doses of painkillers in a given year."
Painkiller drug companies "have long been at the forefront of opposition to marijuana reform, funding research by anti-pot academics and funneling dollars to groups, such as the Community Anti-Drug Coalitions of America, that oppose marijuana legalization..."