nightmares
"Been taking 1mg of prazosin for the last 2 months for PTSD nightmares that were causing sleep problems. Nightmares stopped the first day I took it but, I experienced severe headaches, dizziness, drowsiness, nausea and a lack of energy. As I got used to it, the symptoms gradually improved but did not go away completely. If I've been drinking, the symptoms will worsen but it is bearable. Overall, my nightmares have become rare and I can sleep through the night; the side effects are worth it."