I took lithium some time ago (10+ years ago) to help with my severe depression, as it was supposed to be an augmenting agent. I am pretty sure it helped, but I was on so many other meds and doing so many other treatments at the time that I'm not totally sure what its effects were. As others are saying, definitely be sure to check in with your doctor reguarly about it, as I know it can cause lithium toxicity (of course, I'm no expert on this). I have heard good things about it being an augmenting agent for depression though. And also it helps people with bipolar a lot, I've also heard, though I'm once again not sure on the specifics there since I don't have bipolar. Anyway, hope it helps you!