I used to sleep at least 10 hrs a night on lithium. The tiredness was worst for the first 3 months and improved after that. The acne is zinc responsive so if you do get it just take zinc supplements. I put on lots of weight on lithium mainly due to increasd thirst. But also cos I are more and got hypothyroid. Off lithium now and on abilify and it works really well, is weight neutral. I'm also on an anti depressant.