My father has stage 4 ckd.we consulted a nephrologist on 27/10/2022 that time his blood urea was 47 and serum
creatinine was 3.98.
After taking medicines prescribed by the nephrologist for 20 days.my father got himself tested for blood urea and cretanine.
And (blood urea increased to 100) and s. Cretanine is 3.74.
Is blood urea 100 is dangerous?
Should we go to doctor immediately as he has told us to visit him after 1 month of medication?