Pirilin-don't let him give up your levels. Mine have been known to creep from .4 (had to maintain it that low or I got toxic) to 2.1 (if I remember right; the ER was a weird experience) and was hospitalized with toxicity for several days. I went back on it (because it worked incredibly well for me) and got extremely toxic again after having had consistent .4 levels for months. That time I didn't go to the ER because I knew my level was lower from how sick I'd been and so I just called my pdoc and stopped it.

Despite my horror stories lithium was an amazing drug for me and I wish I could tolerate it without toxicities. 3 big ones is enough though.