Comparative Pharmacology
Head-to-head clinical analysis: SODIUM POLYSTYRENE SULFONATE versus SPS.
Peer-Reviewed Evidence
Head-to-head clinical analysis: SODIUM POLYSTYRENE SULFONATE versus SPS.
SODIUM POLYSTYRENE SULFONATE vs SPS
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Sodium polystyrene sulfonate is a cation-exchange resin that exchanges sodium ions for potassium ions in the gastrointestinal tract, primarily in the large intestine, thereby reducing serum potassium levels.
SPS (sodium polystyrene sulfonate) is a cation-exchange resin that exchanges sodium ions for potassium ions in the gastrointestinal tract, primarily in the colon, thereby reducing serum potassium levels.
Adults: 15 g orally once daily to four times daily, as a single dose or suspension in water or syrup (3-4 mL per gram of resin). May also be administered rectally as a retention enema: 30-50 g every 6-8 hours, retained for at least 30-60 minutes.
15-60 g orally 1-4 times daily; administer as a suspension in water or juice. Alternatively, 30-50 g rectally as a retention enema every 6 hours.
None Documented
None Documented
The terminal elimination half-life of the absorbed fraction is not well-defined due to minimal systemic absorption; hence, half-life is not clinically relevant. The resin itself is not eliminated from the body via metabolism or excretion but is passed in feces.
Not applicable; SPS acts locally in the gastrointestinal tract and does not undergo systemic absorption. No terminal half-life can be defined.
Primarily fecal (via gut) as the resin is not absorbed. Only a small fraction (approximately 0.5-1% of the administered dose) is absorbed, and the absorbed portion is eliminated renally as the sulfonate moiety. Renal elimination contributes minimally to total clearance (<1%).
SPS (sodium polystyrene sulfonate) is a cation-exchange resin that is not absorbed systemically. It is excreted entirely in the feces, with no renal or biliary elimination. The resin-bound potassium is eliminated via the gastrointestinal tract.
Category C
Category C
Potassium Binder
Potassium Binder