Hi
Kidney damage will be assessed by the Value of
Serum Creatinine.
Dialysis is advocated if Serum Creatinine levels are too high.But,it will be decided by
Nephrologist.
Regarding Staph infection,you can shift to another Antibiotic like
Clindamycin which does not affect the kidney.
Please consult your treating doctor and discuss regarding alternative antibiotic as infection may also aggravate kidney damage.
Wish him speedy recovery