Final answer:
Sodium polystyrene sulfonate enema is used to treat hyperkalemia by binding excess potassium in the gut, leading to its excretion and reducing blood potassium levels.
Step-by-step explanation:
Sodium polystyrene sulfonate enema is used for the treatment of hyperkalemia, which is a condition characterized by an abnormally high level of potassium in the blood. The medication works by binding excess potassium in the large intestine, from where it is then excreted from the body. This action helps to reduce the overall potassium levels in the blood, thus addressing hyperkalemia. Sodium polystyrene sulfonate does not work by decreasing intestinal motility, increasing water absorption in the colon, or neutralizing stomach acid.