Has anyone experienced periodic paralysis with their hyperthyroidism? I seem to be getting this quite often and it's really scary. I have RAI in a couple of weeks, but I guess I just need some reassurance right now that this is a normal symptom (if I could get through to my Endo, I'd ask him, but of course they're always so busy...). Just wondering if I'm the only one. It starts with a sudden onset of feeling extremely weak, and my legs will feel like jelly, but the muscles feel tight. Sometimes I have weakness in the hands as well. I feel like I can't stand up. Would appreciate some input if anyone has gone through this.