Its certainly been my personal experience that TM can be hugely beneficial in helping people suffering from PTSD.  Namely members of the armed forces returning from Afghanistan.

 

https://www.psychologytoday.com/us/blog/the-athletes-way/201601/meditation-reduces-post-traumatic-stress-disorder-symptoms

Meditation Reduces Post-Traumatic Stress Disorder Symptoms

Transcendental Meditation can reduce PTSD symptoms and use of medications.

 Vitalii Bashkatov/Shutterstock
Source: Vitalii Bashkatov/Shutterstock