Patients w/ hyperkalemia or who have conditions predisposing to hyperkalemia. Chronic renal failure, uncontrolled DM, acute dehydration, strenuous physical exercise in unconditioned individuals, adrenal insufficiency, extensive tissue breakdown, administration of K-sparing agents (eg, triamterene, spironolactone or amiloride). Patients w/ arrest or delay in tab passage through the GIT eg, delayed gastric emptying, esophageal compression, intestinal obstruction or stricture or those taking anticholinergics. PUD. Renal insufficiency (GFR <0.7 mL/kg/min).