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Generic Name: calcium acetate (KAL see um AS e tate)
Brand Name: Calphron, Eliphos, PhosLo Gelcap, Phoslyra
Physician reviewed Calphron patient information - includes Calphron description, dosage and directions.
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Drug Information:
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. Calphron is used to control phosphate levels to keep them from getting too high in people with kidney failure. Calphron may also be used for purposes not listed in this medication guide. You should not use Calphron if you have high levels of calcium in your blood. You should not use Calphron if you are allergic to it, or if you have high levels of calcium in your blood. Learn more

Calphron Side Effects

Calphron Side Effects

Note: This document contains side effect information about calcium acetate. Some of the dosage forms listed on this page may not apply to the brand name Calphron.

For the Consumer

Applies to calcium acetate: oral capsule, oral solution, oral tablet

Along with its needed effects, calcium acetate (the active ingredient contained in Calphron) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking calcium acetate:

More common

  • Abdominal or stomach pain
  • confusion
  • constipation
  • depression
  • dry mouth
  • full or partial loss of consciousness
  • headache
  • incoherent speech
  • increased urination
  • loss of appetite
  • metallic taste
  • muscle weakness
  • nausea or vomiting
  • thirst
  • unusual tiredness
  • weight loss

Incidence not known

  • Swelling

Some side effects of calcium acetate may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

  • Diarrhea

Less common

  • Itching

Incidence not known

  • Dizziness
  • weakness

For Healthcare Professionals

Applies to calcium acetate: compounding powder, injectable solution, oral capsule, oral liquid, oral tablet


The most common adverse events were hypercalcemia, nausea, and diarrhea.


Very common (10% or more): Hypercalcemia (16.3%)

Hypercalcemia was usually asymptomatic or manifested as constipation, anorexia, nausea, and vomiting, and in 0.1% of patients caused confusion, delirium, stupor, or coma.


Very common (10% or more): Nausea (14%), diarrhea (13.2%)

Common (1% to 10%): Vomiting

Uncommon (0.1% to 1%): Constipation


Common (1% to 10%): Pruritus


Uncommon (0.1% to 1%): Soft tissue calcification

Postmarketing reports: Edema, weakness

Nervous system

Postmarketing reports: Dizziness

Editorial References and Review

Medically reviewed by BestRx Medical Team Last updated on 1/1/2020.

Source: Drugs.com Calphron