Seroquel is serious medicine, that’s for sure. I had some of the trippiest dreams ever experimenting with that stuff. But it will turn you into a zombie. I can understand how people who are having bad psychosis - for example, hearing command hallucinations - might need something this strong. I’ll never forget the dreams I had on that stuff, though. (But if I wanted to poison someone, I would use something else.)
I don’t recall wacky dreams with the stuff, but I was only taking 1 mg/day. It still made me into a zombie shortly after taking each dose, however.