from what I've read, it seems that lithium increases the toxicity of antipsychotics/tranquilizers. So, if you're doing OK on an antipsychotic, adding lithium might be OK, or you might trigger twitches, neuroleptic malignancy syndrome, etc.

Some drug combinations are apparently not OK. Lithium+Haldol has apparently been linked to serious brain damage and near toxic reactions. Maybe its because they high dosed haldol back in the day?

If you don't like your psychiatrist (seems to be a common problem, btw), do you think you could find a DO or MD who does family/general/internal medicine to prescribe? It'd probably be easier to schedule, less attitude from them, and you could get labs done at the same location, if needed. Just a thought.

Hope things work out well for you.