I have been on 300 mg lithium for a month now. I got off of Lamictal and off Prozac this last week. I take 2 mg of clonazepam at night with the Lithium. At first I felt so calm and I was sleeping. Now I have anxiety and nights I don’t sleep at all. My doc is out of town right now. I do have a slip for blood work which I think I should get done right away to see where my levels are. I had genetic testing and those results are back too so I hope they provide answers to match medicines. But is 300 mg of Lithium pretty low for constant mania? I was having episodes of days to weeks of not sleeping. Rapid cycling.