The condition described is likely to be renal artery stenosis causing renal failure in a mentally challenged person. It would probably entail the service of the nephrologist, urologist, vascular surgeon, interventional radiologist and clinical psychologist. Please visit the web site of major private hospitals before making further inquiry.
Consulting a urologist is probably the best way to deal with premature ejaculation and issues related to the prostate. These conditions are usually treatable depending on the root cause of the problem.