1500mg of quetiapine, really!? I'm on a third of that. When I was first put on 300mg I was struggling to get up for work and had to stand outside in the freezing cold in the morning because I was so dizzy every single morning. I didn't come to till about noon. Now I'm on 500mg but I could tolerate more prob another 200-300. But double that, and my friends say I have a high tolerance wow. You must have a fast metabolism or something