The information in the Fact Sheets are presented for educational purposes only.  The information is not a substitute for informed medical advice or training. Do not use this information to diagnose or treat a mental health problem without consulting a qualified health or mental health care provider. All information contained on these pages is in the public domain unless explicit notice is given to the contrary, and may be copied and distributed without restriction. For more information telephone us at (802) 296-5132 or send email to

National Center for PTSD