The Department of Health and Human Services recently signed off on a proposal to study marijuana's potential as part of treatment for veterans with post-traumatic stress disorder. Marijuana is approved to treat PTSD in some states already. In New Mexico, PTSD is the number one reason for people to get a license for medical marijuana, but this is the first time the U.S. government has approved a proposal that incorporates smoked or vaporized marijuana, which is currently classified by the government as a drug with no accepted medical applications. Naturally occurring cannabinoids, similar to THC, help regulate the system that causes fear and anxiety in the body and brain. - Business Insider