<s>[INST] Hi my father 78 yr has been diagnosed with CKD where the ultrasound showed a constricted left kidney that is non functional due to the shrinkage & impaired right kidney 20% - 30%. He is currently taking 2 tb of Renolog after lunch & dinner along with calcium & other suppliments. Are there any chances for his right kidney to recover & avoid the need of dialysis in the future. [/INST] HI, thanks for using Chat Doctor If the damage to the kidneys is due to an acute or short term condition then it is possible that the damage would be reversible, and he could regain function. Acute damage occur in situation such as infections, blood clots, trauma, deny Chat Doctor. These are only a few examples. If the damage is long-standing and potentially continuing then it is unlikely that any reversal would occur. You may want to discuss the prognosis with his doctor. I hope this helps </s>