Hi again Paula 1,200mg is big dose of lithium but if that amount keeps you in the therapeutic range then that is good. For me they like my bloods to be 0.77 and certainly nothing over 0.80. I am on 1,000mg which I thought was a lot. My bloods were 0.60 for years and it was only when I had a major blip that they were upped. I think that the higher range is usually used for bi-polar and to prevent mania. I hope that your lithium levels can be stabilised soon.