I am pretty sure that is what they started me on. With my blood pressure med, and my 3 different heart meds, taking prazosin would make me pass out. The regular meds I take for my heart slow down the speed blood flows through my heart. I have 3 leaky valves, so my meds couldn't be changed, and my blood pressure medication couldn't be changed to prazosin. It just didn't work for me because of medical issues, but while I was taking it, it did help with some of the nightmares. If I didn't have to take the regular meds I take, I definitely would go for prazosin!!!!!!!