I stayed within a stable 0.7 range, was never toxic, didn't have any organ damage and had regular blood work, despite my very strong dislike for needles.

For some reason I experienced a very rare side effect, extreme stupidity.

I could not deal with being dumber than a rock, AND getting lithium acne, so I was no longer smart nor pretty.

Regained my grey matter two years after quitting, oh and my skin returned back to normal too.