Good morning I understand your concern But this is not a thing to worry at all Your mother's creatinine is elevated because she is dehydrated It will recover with hydration Also she is being prescribed a tablet called Dytor It will make the kidney to produce more urine but will cause Dehydration and increase urea and creatinine Also her sodium and Chloride are low, which means her body needs some Salt Hope she doesn't have any swelling of legs or heart failure condition