The Department of Veterans Affairs estimates up to 30 percent of former American service members — from the Vietnam War to Iraq and Afghanistan — have post-traumatic stress disorder.
They don't all seek treatment. But among those who do, the VA says 20 to 40 percent don't get better with the standard regimen of therapy, medication or both.
Increasingly veterans are seeking out alternative mental health care — much of it untested.
NEPR's Karen Brown visited a treatment center in Western Massachusetts and joined Morning Edition with this report.
This segment aired on August 2, 2016.