Of the top 50 prescribed psych meds, at one point or another I have been on 28 of them

. Somehow I've avoided lithium up to this point. But I just swapped Risperdal for it. I'm curious what a typical dosage is? Pdoc is starting me off on 600 mg, which she said was low.
I read the reviews in the med section and they seem very bipolar, actually, LOL -- either you love it or you hate it. I've been depressed enough to be thinking really bad thoughts, so I hear it helps with that, which will be nice. Is there anything I should really be aware of, though?
I'm hoping, with the cost savings (yaaaaay, generics!), that I can use the difference between what the Risperdal cost and what this costs to join a gym and lose the 12 lbs. I gained in 2 months on Risperdal.

So I'd especially appreciate hearing if lithium does anything to appetite!
thanks
Candy