Once he is already a known ckd, and creatinine is 4.4 reducing it is almost not possible unless it's a recent worsening..... Pls furnish his complete reports. If the creatinine worsens he may need dialysis

Hello, You didn’t mention comorbidities like High BP or diabetes, if your father is having them, they need to be controlled. Ultrasound scan does it show any stones or prostate problem?..need to be addressed accordingly If there is any recent insult to the kidney, it might recover to its baseline orelse it will not Advice:CKD diet( low protein, low salt diet, fluid intake 1 litres per day. avoid fruits, coconut water, phosphorus rich foods.) Medication adherence Vaccination Av fistula creation Review monthly with nephrologist with KFT and serum electrolytes Be aware of warning signs when dialysis needs to be initiated

Please consult a nephrologist. He may need dialysis or renal transplant over the course of time.