My daughter is on zyprexa and has involuntary movements. I know meds can cause this because I researched the meds. She can't do without them so I don't know how to help her. I hear there is brain stimulation and meds but both sound serious...too severe...can cause more movements. What about changing your meds? My daughter can't as they are too afraid to because without them she cannot function normally at all. But maybe that would be an option for you. Best of luck.
Blessings,
Lynne