A couple of weeks ago the Mayo Clinic officially anounced that Prazosin(a blood pressure medication) is an effective treatment for PTSD related nightmares and sleep problems associated with PTSD.
The official report is only available to those in the mental health profession however there is a basic article (from 6 March, 2012) which tells a little about it.http://www.mayoclinic.org/news2012-rst/6732.html?rss-feedid=6
I personally haven't had nightmares much at all lately but I still suffer from other sleep problems so my psychologist is setting up a meeting with my doctor, a psychiatrist, herself and me to look at the possibility of putting me on a program with this medication.
Apparently quite a bit of studies have been done with veterans coming back from Iraq and Afghanistan with major PTSD and this has been incredibly effective. It's nothing new to use Prazosin for PTSD but it hasn't been very common, but the newer research results I guess are overwhelming.
This looks like a very promising breakthrough in helping with the nightmares and other sleep problems associated with PTSD.