Hyperkalemia or conditions predisposing to hyperkalemia eg, chronic renal failure, uncontrolled DM, acute dehydration, strenuous physical exercise in unconditioned individuals, adrenal insufficiency, extensive tissue breakdown. Concomitant use w/ K-sparing agent eg, triamterene, spironolactone or amiloride; anticholinergic medication. Patient suffering from delayed gastric emptying, esophageal compression, intestinal obstruction or structure. PUD. Renal insufficiency (GFR <0.7 mL/kg/min).