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OPRA Pharmacology and Toxicology QUESTION #3852
Question 1
Sodium polystyrene sulfonate functions as a cation exchange resin. Which ion does it exchange in place of sodium?
  • Potassium✔️
  • Phosphorus
  • Calcium
  • Chloride
Correct Answer Explanation
Sodium polystyrene sulfonate releases sodium ions and binds potassium in the gut, making it useful in hyperkalaemia.