Prazosin
"I use this for nightmares related to C-PTSD. I was getting nightly terrors, just screaming nightmares every night related to flashbacks, I couldn't tell the difference between being asleep or awake and would wake up exhausted and stay that way throughout the day. 

With this drug, my nightmares have stopped, but I feel very dizzy and lethargic the next morning, and often more depressed. My sleep is much better, but the mornings are a write-off as I end up in tears for hours after waking. I guess the stress needs to escape somehow and instead of through sleeping, I get more of an effect upon waking. The drug does work to get rid of the nightmares, though."