I take 750mg daily, was on 1g but new pdoc says is trialing just 750mg. My levels are only 0.4-0.5 on 750mg. I really don't have any side effects that I can really recognise except mild nausea after taking it especially without food, also I developed gastritis but that's gone away with nexium. I haven't had any weight gain or acne. My memory & concentration were terrible prior to starting lithium & I also had a tremor prior too so I can't comment on that. I'm not sure if it's helping or not for my depression/suicidal ideation but it definatly reduces my agitation, at both 1g & 750mg it achieves this. I can't think of anything worse than dysphoric hypomania, it's living hell. Lithium definatly takes that away or at least reduces it to tolerable levels. I also take 40mg fluoxetine, which helped incredibly to begin with but has plateaued & I feel may not be working the same anymore. Don't know if that's because of the addition of lithium or if it's just antidepressant poop out. Nothing has touched my anxiety.