PTSD: Marijuana is reducing suicide among Vets with PTSD

"Using state-level data for the period 1990 through 2007, we estimate the effect of legalizing medical marijuana on suicide rates. Our results suggest that the passage of a medical marijuana law is associated with an almost 5 percent reduction in the total suicide rate, an 11 percent reduction in the suicide rate of 20- through 29-year-old males, and a 9 percent reduction in the suicide rate of 30- through 39-year-old males.
We conclude that the legalization of medical marijuana leads to an improvement in the psychological wellbeing of young adult males, an improvement that is reflected in fewer suicides." 

http://www.alternet.org/drugs/medical-marijuana-can-be-much-needed-miracle-vets-ptsd?akid=11153.294211.upez3N&rd=