Kidney ayurvedic treatment (creatinine

My Father's age is 65 years. He is experiencing so much sleepiness and sleeps most of the time. His one kidney is shrinked and the other one is having cysts. About his health condition:- He had a Paralysis attack seven years ago. He recovered successfully. Now he is taking blood pressure tablets since then. Now he is suffering from CKD from last one year. Twenty days ago his creatinine level was 2.5. Today  his creatinine level shoots up to 4. He experience itching on fingers of leg as well as on head. Also, he experience stomatch pain, or stool sometimes. The doctors give tablets for BP, and other Symptoms, but no tablets, medicine for kidney recovery or for reducing creatinine. I request the doctors to please suggest tablets/medicine to reduce the creatinine level and to recover the kidney functioning. Also requesting to please suggest diet for my father. Is Kidney recovery possible in Ayurveda? Please suggest. Thanks Anshul