<s>[INST] My father in law has been doing dialysis since December... and all was going well. Within the last few weeks, he is now so weak that he is having problems walking. It seems as if he is very weak after dialysis. On the days he doesn t have dialysis... he can move some. He also has rheumonitory arthridis.. All his lab work show good numbers. I know he is frustrated, and we are just looking for some answers. [/INST] He should have serum creatinine,Na And K levels checked up.consult rheumatologist for arthritis, medicines have to be cautiously given in view of poor kidney function.Electral powder supplement can be tried after dialysis to overcome weakness </s>