What Causes Shaking In Body When On MultaK?

My mom has ESRD, PVD. She has been on Metoprolol, Cardizem, Lasix, Coumadin (Afib), recently had Digoxin added because her heart rate at rest is 118bpm Per nephrology .125mcg QOD is ok. She has started this leg weakness. She gets up and starts shaking, she feels like she is going to fall. She had this occur several months ago when she was on MultaK, when this stopped, so did these symptoms. The only newer meds are the Cardizem about 3 months ago and the recent DIG. She was evaluated by Neurology when this occured in the past and they said that it did not appear to be TIA or Stroke. Could it be due to build up of waste? It just is odd that it stopped for a long while and now all of the sudden, 2 weeks post Dig. beginning it started. I also wonder if it is possibly related to decreased blood volume?

I know this is complex, I just dont get any good answer on cause, Per nephrology, it is not that, Per Neurology it is not that, Renal and Cardiology keep thinking possible TIA. She has a Pacer so she is unable to have MRI and we cant use Dye for CT. I wonder if we are not seeing something possibly?



Thanks,