I was on 1mg of Prazosin up until about 3 months ago. I am now on 2mgs as the nightmares came back. I couldn't remember the nightmares most of the time, but they were interfering with me getting a good night's sleep. In all, I have been on it for over two years and it has worked for me.

Do you have high blood pressure also? I ask because 10mgs is really high for PTSD/nightmares. The Prazosin has lowered my blood pressure slightly and I don't have high blood pressure. I hope your dr. is monitoring yours. I would hate to find out that it bottomed out and you passed out from hypotension. Especially if you are very sensitive to medications.