»RELATED: Veteran allowed to keep ducks that help with PTSD
Next, the researchers took a look at five studies and reviews that assessed cannabis use for treating PTSD. They found that the evidence here was also lacking. One portion of a study even showed that symptoms worsened for veterans who used the drug during the assessment.
"Overall, we found insufficient evidence regarding the benefits and harms of plant-based cannabis preparations for patients with PTSD. The body of literature currently available is limited by small sample sizes, lack of adjustment for important potential confounders, cross-sectional study designs, and a paucity of studies with non–cannabis-using control groups," the study said.
Currently, medical marijuana is legal in 28 states and Washington D.C., and up to 80 percent of people who request it say they use it for pain management. However, the latest research suggests there isn’t enough proof that it works.
"The current studies highlight the real and urgent need for high-quality clinical trials in both of these areas," Dr. Sachin Patel, a psychiatry researcher at Vanderbilt University Medical Center, told Reuters.
“If cannabis is being considered for medical use,” she continued, "it should certainly be after all well-established treatments have failed.”
»RELATED: Here’s what happens to your body when you don’t get enough sleep