A patient is admitted to the hospital with hyperkalemia. The patient is prescribed sodium polystyrene sulfonate (Kayexalate). How does this medication lower the patient's potassium level?
A) It decreases the absorption of exogenous potassium.
B) It increases urinary excretion of potassium.
C) It combines with potassium ions for elimination.
D) It releases sodium to acidify urine with potassium.
C
Feedback:
Sodium polystyrene sulfonate (Kayexalate), a cation exchange resin, administered orally, removes potassium from the body in the stool. Kayexalate does not decrease the absorption of potassium. Kayexalate does not increase urinary excretion of potassium. Kayexalate does not release sodium to acidify urine with potassium.
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