This manual contains protocols and guidance documents assembled by the authors during many years of clinical experience in nephrology. Many are not evidence-based but we have found them useful and hope that others will do likewise. The recommendations were made on the basis of clinical trials wherever possible. In the absence of relevant clinical trials, we used evidence available or our personal experience. Our aim was to provide a manual for the treatment of the most frequent kidney diseases or disorders related to the practice of Nephrology. The information may be of use to nephrologists, general internists, general practitioners or medical students.