calcium acetate, Phoslyra, PhosLo, Eliphos

  • Pharmacy Author:
    Omudhome Ogbru, PharmD

    Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.

  • Medical Editor: Jay W. Marks, MD
    Jay W. Marks, MD

    Jay W. Marks, MD

    Jay W. Marks, MD, is a board-certified internist and gastroenterologist. He graduated from Yale University School of Medicine and trained in internal medicine and gastroenterology at UCLA/Cedars-Sinai Medical Center in Los Angeles.

DOSING: The recommended initial dose of calcium acetate for adult dialysis patients is 2 tablets or capsules with each meal. The dosage may be increased gradually to reduce blood phosphate levels below 6 mg/dl without causing hypercalcemia. Most patients require 3-4 tablets or capsules with each meal.

DRUG INTERACTIONS: Calcium acetate may decrease the absorption of tetracycline (Sumycin, Actisite, Achromycin V).


Calcium acetate may be used safely in pregnant women if calcium levels are monitored and kept within normal limits.

It is not known how much additional calcium is excreted in human milk from using calcium acetate. Calcium is a normal nutritional component of human milk.

PREPARATIONS: Tablet or capsule: 667 mg; Oral solution: 667 mg/5 ml.

STORAGE: Calcium acetate should be stored at room temperature, 15 C to 30 C (59 F to 86 F).


  • Calcium acetate helps reduce phosphate levels in people with advanced kidney disease.
  • People with advanced kidney failure retain phosphate leading to too much phosphate in their bodies (hyperphosphatemia). High phosphate levels cause hyperparathyroidism, which leads to abnormal bone formation and calcium deposits in tissues.
  • Calcium acetate is a phosphate binder. Calcium acetate, when taken with meals, combines with phosphate in food to form calcium phosphate, which is poorly absorbed into the body and is excreted in the feces.
  • Binding phosphate in the intestines reduces absorption of phosphate into the body.
  • The FDA approved calcium acetate in December 1990.

Reference: FDA Prescibing Information

Medically Reviewed by a Doctor on 1/13/2016
FDA Logo

Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

RxList Logo

Need help identifying pills and medications?

Use the pill identifier tool on RxList.

Subscribe to MedicineNet's Newsletters

Get the latest health and medical information delivered direct to your inbox!

By clicking Submit, I agree to the MedicineNet's Terms & Conditions & Privacy Policy and understand that I may opt out of MedicineNet's subscriptions at any time.

Health Solutions From Our Sponsors