This is probably too simplistic but could you take more loxapine? I didn't tolerate it well enough to get to a level where it would have caused weight gain or sleepiness if it was going to but that would certainly be the easiest solution if it works that way. I just don't remember. I liked it, increased the dose the first time and had EPS badly and had to stop. My memory is that I was weaning off Seroquel to let that become my sedative but it wasn't' to be for me.

I hope you find something that works. I know how frustrating it is.