Type IV A is the only type characterized by a hyperkalemic, hyperchloremic acidosis. CAUSES OF HYPOKALEMIA Inadequate potassium intake Eating disorders : Anorexia, bulimia, starvation, pica, and alcoholism Dental problems: Impaired ability to chew or swallow Povey: Inadequate quantity or quality of food (eg, "tea-and-toast" diet of elderly individuals) Hospitalization: Potassium-poor TPN Increased potassium excretion Mineralocoicoid excess (endogenous or exogenous) Hyperreninism from renal aery stenosis Osmotic diuresis: Mannitol and hyperglycemia can cause osmotic diuresis Increased gastrointestinal losses Drugs Genetic disorders Endogenous sources of excess mineralocoicoid include the following: