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Phoslo Patient Information Including Side Effects

Brand Names: Eliphos, PhosLo Gelcap, Phoslyra

Generic Name: calcium acetate (Pronunciation: KAL see um AH seh tate)

What is calcium acetate (Phoslo)?

Calcium is a mineral that is needed for many functions of the body, especially bone formation and maintenance. Calcium can also bind to other minerals such as phosphate, and aid in their removal from the body.

Calcium acetate is used to control phosphate levels to keep them from getting too high in people with kidney failure.

Calcium acetate may also be used for purposes not listed in this medication guide.

Calcium Acetate 667 mg-ROX

capsule, blue/white, imprinted with 54 215

PhosLo 667 mg Cap

capsule, blue/white, imprinted with PhosLo, 667 mg

What are the possible side effects of calcium acetate (Phoslo)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Less serious side effects are more likely to occur, such as:

  • nausea, vomiting, loss of appetite;
  • constipation;
  • dry mouth or increased thirst; or
  • urinating more than usual.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the Phoslo (calcium acetate tablet) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about calcium acetate (Phoslo)?

Do not use this medication if you have high levels of calcium in your blood, or if you are also taking digoxin (digitalis, Lanoxin, Lanoxicaps).

Do not take additional calcium supplements unless your doctor has told you to.

Avoid using antacids without your doctor's advice. Use only the specific type of antacid your doctor recommends. Many antacids contain calcium and you could be getting too much of this mineral if you take a calcium antacid with calcium acetate.

Side Effects Centers

Phoslo - User Reviews

Phoslo User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Phoslo sorted by most helpful. Patient Discussions FAQs

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.

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