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— A growing number of states are weighing whether to legalize marijuana to treat post-traumatic stress disorder. But for many veterans, the debate is already over.

They’re increasingly using cannabis even though it remains illegal in most states and is unapproved by the Department of Veterans Affairs because major studies have yet to show it is effective against PTSD.

While the research has been contradictory and limited, some former members of the military say pot helps them manage their anxiety, insomnia and nightmares. Prescription drugs such as Klonopin and Zoloft weren’t effective or left them feeling like zombies, some say.

“I went from being an anxious mess to numbing myself with the pills they were giving me,” said Mike Whiter, a 39-year-old former Marine who lives in Philadelphia, where marijuana is illegal. “Cannabis helped me get out of the hole I was in. I started to talk to people and get over my social anxiety.”

Others, though, have seen little benefit from the drug. And the VA has documented a troubling rise in the number of PTSD-afflicted veterans who have been diagnosed with marijuana dependence, which some experts say can hamper recovery from war trauma.

Sally Schindel, of Prescott, Arizona, said the VA diagnosed her son Andy Zorn with PTSD after he served in the Army in Iraq. The agency later diagnosed him with marijuana dependence as well as depression and bipolar disorder, she said.

Schindel said her son was using marijuana not for recreation but as self-medication, particularly to help him sleep. He killed himself at age 31 in 2014, writing in his suicide note that “marijuana killed my soul & ruined my brain.”

“He told me he found it much harder to quit than he thought it would be,” Schindel said. “He’d buy it and smoke it and then flush the rest of it. The next day he bought it again.”

The stories of vets like Zorn and Whiter have helped fuel the debate over whether states and the federal government should legalize the drug for PTSD treatment. Lawmakers are increasingly sympathizing with vets like Whiter, despite the lack of scientific evidence. While some limited studies have shown that marijuana helps people manage PTSD symptoms in the short term, another suggested it may make symptoms worse.

Starting with New Mexico in 2009, 10 states have listed PTSD among the ailments for which medical marijuana can be prescribed, according to the Marijuana Policy Project, which seeks to end criminalization of the drug. A few more states give doctors broad enough discretion to recommend pot to PTSD sufferers.

Similar measures have been introduced in Georgia, Illinois, New Hampshire, New Jersey, Pennsylvania, Rhode Island and Utah.

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