I used to take higher doses, but now at only 50mg I am getting hallucinations when its effect is at its highest (i.e. when I no longer have any saliva and am close to passing out). I start seeing spiders and the like and all kinds of things out of the corners of my eyes. I've been meaning to bring it up with my pdoc, though it doesn't bother me so much that I'd change the Seroquel -it really helps me sleep.