My father had a small bladder tumour removed in mid September. They found a staph infection which he was not given medicine for as they missed it. Month later he had same turbt surgery to remove a stent which was on or next to his kidney and they found necrotic tissue and mucosa found on his kidney when his stent was removed. He also has on top right of his lung a tumour very small it is either stage one lung cancer or a benign tumour. The lung tumour has been there since 2014 only grown a very small amount gradually. He still has a staph infection as the antibiotics did not work he has been given nitrofuran to take but I'm worried since he has a damaged kidney is it alright for him to take the antibiotics since the warning label mentioned if you have kidney disease then it can worsen it. And we don't know what his kidney problem is yet but he is getting fatigue and he is currently anemic too also pain where the kidney stent was. Could anyone say what the kidney problem may be? & If he should take the antibiotics for the staph and now uti that he has?