I have been taking seroquel specifically for sleep for over 10 months now. I started on 25 mg before bed but have slowly moved up to 400 mg. For the longest time, I had bad headaches when I woke up in the morning but those went away. 90% of the time it works, but every now and then it just doesn't. I often dream now where as before I took it, I barely ever had a dream. The only complaint i have is that sometimes the dose i take is not enough and sometimes it's too much. I never know how much to take. Does anyone else have that trouble with the drug?