Tony Anderson: If your mother's body writhes uncontrollably I would bet she is overmedicated and needs to have her PD meds readjusted. However if she has a rhythmical shaking of limbs, head, mouth, tongue, or other part of body- that is tremor and her meds are taking care of that. Some neurologists are now using selective serotonin re-uptake inhibitors - Paxil, Prozac, or Zoloft - for depression. Your mom probably has what most of us have - regular old fashioned idiopathic PD. At this point we don't know the cause or cure. That's pretty depressing in itself. Barbara Yacos <[log in to unmask]>