Hi there! I have been off Seroquel for about 4 months now but find my sleep has gone back to rubbish. I started on 50mg, then 25mg, then stayed on12.5mg for around 3 months before I stopped taking it. By taking 12.5mg again intermittently, should this cause weight gain? I gained weight when I was on it before, but I started on a higher dose and I was taking it every night. Oh, the Seroquel is for insomnia.