Patients w/ hyperkalemia or who have conditions predisposing to hyperkalemia eg, chronic renal failure, uncontrolled DM, acute dehydration, strenuous physical exercise in unconditioned individuals, adrenal insufficiency, extensive tissue breakdown, or the administration of K-sparing agent (eg, triamterene, spironolactone or amiloride). Patients suffering from delayed gastric emptying, esophageal compression, intestinal obstruction or stricture or those taking anticholinergic medication. Not to be given to patients w/ PUD. Renal insufficiency (GFR <0.7 mL/kg/min).