A month, I'm still taking half of it (150 of 300mg), besides all the other mood stabilizers and Wellbutrin. It can't be hurting me any more than it was, I'd be where I am either way, at least this way I had a chance of it being better - that maybe I wouldn't be so tired so I'd be less depressed. But it doesn't matter. None of these medicines are helping. It's so pointless.