Prazosin
"I know you have to wait at least 3-4 weeks. So far I'm on week 3 and still unsure if it works.   First few nights on 1mg a day, I flipped up out of my sleep several times.  Dr increased it to 2mg a day and I still can't get consistent sleep patterns.  Some days yes and others no.  One night I stayed up like I was on drugs.  Finally passed out around 1am.  Week 3, I've now gotten the "gotta go to the bathroom #2" side effect which my doctor says happens.   It's like a sore stomach with diarrhea but not full blown diarrhea.   The one good thing is my BP has responded to the meds.   Less nightmares but then again I'm not really sleeping either.  I'm still going to continue and see where it goes."