Calcium%252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520acetate

# Calcium Acetate ## Overview Calcium acetate is a phosphate binder used to control hyperphosphatemia in patients with chronic kidney disease (CKD). ## Primary Indications * Management of hyperphosphatemia in patients with end-stage renal disease (ESRD). ## Adult Dosing * **Dosage is highly individualized and titrated based on serum phosphate levels and dietary phosphate intake.** * **Initial dose:** Start with 667 mg (equivalent to 169 mg elemental calcium) orally with each meal. * **Titration:** Increase dose as needed to control serum phosphate. Monitor serum phosphate and calcium levels. * **Maximum dose:** Doses up to 4000 mg (1013 mg elemental calcium) per day have been used. Higher doses may increase the risk of hypercalcemia. * **Administer:** With meals or immediately after to effectively bind dietary phosphate. ## Pediatric Dosing * Limited data available. Dosing should be individualized based on clinical response and monitoring. * Some sources suggest starting at 1-2 grams per day divided into multiple doses with meals, titrated based on serum phosphate. ## Dose Adjustments * **Hypercalcemia:** If serum calcium exceeds the therapeutic goal (e.g., > 10.5 mg/dL or as per local protocol), reduce the dose or discontinue the medication. * **Hypophosphatemia:** While less common, monitor for hypophosphatemia if phosphate levels drop too low. ## Contraindications * Hypercalcemia. * Hypersensitivity to calcium acetate. * History of nephrocalcinosis. ## Adverse Effects * **Common:** Hypercalcemia, constipation, nausea, vomiting, abdominal pain. * **Serious:** Worsening hypercalcemia, hypophosphatemia, gastrointestinal obstruction, calcification of soft tissues. ## Key Drug Interactions * **Tetracyclines and Quinolones:** Calcium acetate can decrease the absorption of these antibiotics. Administer at least 2 hours before or 6 hours after calcium acetate. * **Thyroid Hormones:** Calcium acetate may decrease absorption of levothyroxine. Separate administration by at least 4 hours. * **Antacids:** Concurrent use may increase the risk of hypercalcemia. * **Vitamin D Analogs:** May increase the risk of hypercalcemia. ## Monitoring * **Serum Phosphate:** Regularly monitor, especially during dose adjustments. Target levels are typically < 5.5 mg/dL (as per KDIGO guidelines or local protocol). * **Serum Calcium:** Monitor regularly to prevent and manage hypercalcemia. Target levels should be within the normal range or as per local protocol. * **Serum Magnesium and Alkaline Phosphatase:** May be monitored periodically. * **Signs and Symptoms of Hypercalcemia:** Monitor for confusion, lethargy, nausea, vomiting, constipation, polyuria, polydipsia. ## Clinical Pearls * The elemental calcium content of calcium acetate (e.g., 250 mg tablets contain ~63 mg elemental calcium) is important for calculating total daily elemental calcium intake, especially in patients who also receive calcium supplements or other calcium-containing products. * Patient adherence to taking the medication with meals is critical for efficacy. * Individualize therapy based on patient's dietary phosphate intake and biochemical parameters. *** *Disclaimer: This information is intended for educational purposes and does not constitute medical advice. Always consult the most current prescribing information and clinical guidelines, and use your professional judgment when making treatment decisions. Dosing recommendations may vary based on local protocols and individual patient factors.*