This document summarizes renal pharmacology, focusing on different classes of diuretics and their mechanisms and sites of action. It discusses carbonic anhydrase inhibitors, loop diuretics like furosemide, thiazide diuretics, potassium-sparing diuretics, and osmotic diuretics like mannitol. For each class, it provides details on mechanisms, indications, toxicities, and key differences between drugs in the class. Tables and figures are included to illustrate sites of action in the nephron.