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Calcium acetate (By mouth)

Calcium Acetate (KAL-see-um AS-e-tate)

Helps control the amount of phosphorus in the blood and is used for patients whose kidneys have stopped working.

Brand Name(s):

Calphron, Eliphos, Phos Lo, PhosLo, Phoslo, Phoslyra

There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

This medicine is not right for everyone. Do not use it if you had an allergic reaction to calcium acetate, or if you have hypercalcemia.

How to Use This Medicine:

Capsule, Liquid, Tablet

  • Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.
  • It is best to take this medicine with food.
  • Take any other medicines at least 1 hour before or 3 hours after you take the oral liquid. If you need help deciding the best times to take your other medicines, ask your doctor or pharmacist.
  • Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup.
  • Missed dose: If you have eaten a meal in the past hour, take your usual dose of the medicine. Take your next dose at your regularly scheduled time. If it has been more than 1 hour or if it is almost time for your next meal, skip the missed dose. Then take your next dose at the regular time. Do not take 2 doses to make up for a missed dose.
  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Throw away any unused oral liquid after 24 months.

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Some medicines can affect how calcium acetate works. Tell your doctor if you are taking any of the following:
    • Antibiotics
    • Digitalis
    • Other products containing maltitol
    • Vitamin D supplements
  • Do not use antacids unless you have talked with your doctor.

Warnings While Using This Medicine:

  • Tell your doctor if you are pregnant or breastfeeding, or if you have any medical conditions.
  • Call your doctor if your symptoms do not improve or if they get worse.
  • Do not take other calcium supplements or eat foods that have large amounts of calcium (such as milk, cheese, and yogurt) while you are taking this medicine. Too much calcium can cause a harmful problem called hypercalcemia.
  • Your doctor will check your progress and the effects of this medicine at regular visits. Keep all appointments.
  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
  • Confusion or extreme excitement
  • Constipation, loss of appetite, nausea, or vomiting
  • Severe sleepiness

If you notice these less serious side effects, talk with your doctor:

  • Diarrhea
  • Mild itching

If you notice other side effects that you think are caused by this medicine, tell your doctor

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088


Last Updated: 12/4/2014


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