What is the normal value of urea nitrogen and creatinine?

The normal value of urea nitrogen is between 2.5-7.5mmol/L, while the normal value of creatinine is between 30-110μmol/L. If creatinine rises, it is necessary to go to the hospital in time for bilateral renal color Doppler examination. If there is renal insufficiency, it is necessary to use renal protective drugs in time for active treatment.