Thanks Wanderlust. I needed something positive tonight; you made my day?middle of the night? . I wish I had something helpful. I had gone off (cold turkey) because of toxicity symptoms that wouldn't let up after a bad toxicity about 6 months before. But when I had problems and we knew it worked for me we re-started it. I think we started keeping my level lower then or doing a lot of tests to try to find out how much it changed. I know we'd been keeping it at maybe .9 max when I had my 2nd toxicity which was 4 years after the first. After that we never let it over .6 but it still crept up and I got toxic one last time. That was the end of lithium for me (except trying a wee little bit in Nov/Dec, I think just to do something). So no idea if it wasn't helping.