Have you tried loxapine? My pdoc put me on it after clozaril because he said it was the closest med to clozaril we could get. It works quite well! Unfortunately, I can't physically tolerate that either (causes extreme bodily fatigue, to the point where I can't even walk a BLOCK without feeling like I'm dying and no, I don't get out of breath and no, I may be fat, but I'm twenty pounds overweight for Pete's sake! Not fifty! And I can't be THAT out of shape!!! Jeez. It's not like I'm runnng a marathon!). So I had to reduce my dose from 150mg to 50mg and plan on weaning myself the rest of the way off.

Anyway, that's worth a shot too. And no bloodwork required.