Hyperkalemia

In medicine, hyperkalemia is an "abnormally high potassium concentration in the blood, most often due to defective renal excretion. It is characterized clinically by electrocardiographic abnormalities (elevated T waves and depressed P  waves, and eventually by atrial asystole). In severe cases, weakness and  flaccid paralysis may occur."

Sodium polystyrene sulfonate
The efficacy and safety of sodium polystyrene sulfonate (Kayexalate) have been reviewed.