Comparative Pharmacology
Head-to-head clinical analysis: AURYXIA versus CALCIUM ACETATE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AURYXIA versus CALCIUM ACETATE.
AURYXIA vs CALCIUM ACETATE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
AURYXIA (ferric citrate) is a phosphate binder that reduces serum phosphate by binding dietary phosphate in the gastrointestinal tract, forming insoluble ferric phosphate complexes that are excreted in the feces. The iron component also increases serum iron parameters and may improve iron stores.
Calcium acetate binds with dietary phosphate in the gastrointestinal tract, forming insoluble calcium phosphate that is excreted in feces, thereby reducing serum phosphate levels.
Adult: 1 tablet (1700 mg ferric citrate) three times daily with meals, titrated every 2-4 weeks to achieve target serum phosphate levels. Maximum dose: 12 tablets per day.
668 mg (169 mg calcium) to 2 g (500 mg calcium) orally three times daily with meals, titrated to maintain serum phosphorus within target range (2.5-4.5 mg/dL). Maximum dose typically 4 g calcium per day.
None Documented
None Documented
Clinical Note
moderateCalcium acetate + Clodronic acid
"The serum concentration of Clodronic acid can be decreased when it is combined with Calcium acetate."
Clinical Note
moderateCalcium acetate + Tranilast
"The therapeutic efficacy of Tranilast can be decreased when used in combination with Calcium acetate."
Clinical Note
moderateCalcium acetate + Alendronic acid
"The serum concentration of Alendronic acid can be decreased when it is combined with Calcium acetate."
Clinical Note
moderateNot applicable; systemic absorption is minimal. AURYXIA is not absorbed and acts locally in the GI tract.
Not applicable for calcium acetate as a compound; serum calcium half-life is approximately 4–6 hours after absorption, reflecting rapid redistribution and renal clearance.
Primarily fecal as unabsorbed drug (≥99%). Renal excretion is negligible (<1%).
Calcium acetate dissociates in the gastrointestinal tract; calcium is absorbed or excreted in feces, acetate is metabolized. Renal excretion accounts for <20% of absorbed calcium; biliary/fecal elimination is minimal. Unabsorbed calcium acetate is eliminated in feces.
Category C
Category C
Phosphate Binder
Phosphate Binder
Calcium acetate + Technetium Tc-99m medronate
"The serum concentration of Technetium Tc-99m medronate can be decreased when it is combined with Calcium acetate."