Meds: Prazosin?

Howdy all. I just got back from a visit with my new shrink, who I think I am really going to like. Even though he's "making" me go back into therapy. But that's a whole other post...

I have a fairly severe anxiety disorder and have been taking trazodone for years at night as a sleep aid (amongst other things), but my last shrink (an icky one to whom I will never return) tinkered with my meds list and suddenly I started having really vivid dreams and horrible nightmares. After fruitless attempts to get in touch with Icky Shrink, I stopped taking the trazodone as vivid dreams are one of the potential side effects. The nightmares have lingered, however, and the new shrink has suggested a different approach -- prazosin. Before I dive in, I wondered if anybody here has had experience with it, good or bad?

I realize that anecdotes are no substitute for an evaluation from a psychiatrist. I'm just hoping that someone will have a good story that will help relieve some of my anxiety.