To bind or to let loose: effectiveness of sodium polystyrene sulfonate in decreasing serum potassium.

Patients with higher initial serum potassium (≥5.6 mEq/L) reduced their potassium concentration 4% more than those with initial serum potassium of <5.6 mEq/L; however, this reduction did not reach statistical significance ( P = 0.32).

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