nightmares
"I started taking Prazosin in 2012 when I was diagnosed with PSTD & Conversion Disorder. When I first started taking Prazosin It helped me a lot, but like another poster stated it did bring things out that had been pushed Deep into my mind that I had been suppressing for years and didn't know it.
I'm glad I take it and will continue taking it. I started 1 - 2 caps bedtime.
Then I was just upped to 3/ 1mg. 
Only side effect I can think of is diarrhea from time to time.
I hope this helps others and may God bless you on your journey to finding what works for you."