I was born with polycystic kidneys and diagnosed nearly 50 years ago...at no time did any renal doctor I met (which has been very regularly at clinics over that period) refer to any kind of medication (not even experimental) which would help maintain kidney function. There are none that I am aware of. Unlike the liver...kidneys do not regenerate. Of course, there may be something I am missing here in relation to different kinds of kidney disease. The best most of us can do is to take meds to keep blood pressure under control to minimize deterioration and to keep well hydrated. the length of time it would take for kidneys to fail to the point where dialysis is needed varies greatly depending on cause and on genetic make up (my grandfather, who passed it on to my mother, died from old age before he even knew he had it....she was dialysing in her early forties - neither were diabetic). There are no pills to stop kidney disease...yet.