PhosLo Gelcap Side Effects
Generic name: calcium acetate
Medically reviewed by Drugs.com. Last updated on Mar 17, 2022.
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 PhosLo Gelcap.
For the Consumer
Applies to calcium acetate: oral capsule, oral solution, oral tablet
Side effects requiring immediate medical attention
Along with its needed effects, calcium acetate (the active ingredient contained in PhosLo Gelcap) 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:
- Abdominal or stomach pain
- dry mouth
- full or partial loss of consciousness
- incoherent speech
- increased urination
- loss of appetite
- metallic taste
- muscle weakness
- nausea or vomiting
- unusual tiredness
- weight loss
Incidence not known
Side effects not requiring immediate medical attention
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:
Incidence not known
For Healthcare Professionals
Applies to calcium acetate: compounding powder, injectable solution, oral capsule, oral liquid, oral tablet
Very common (10% or more): Hypercalcemia (16.3%)[Ref]
Hypercalcemia was usually asymptomatic or manifested as constipation, anorexia, nausea, and vomiting, and in 0.1% of patients caused confusion, delirium, stupor, or coma.[Ref]
Very common (10% or more): Nausea (14%), diarrhea (13.2%)
Common (1% to 10%): Vomiting
Uncommon (0.1% to 1%): Constipation[Ref]
Uncommon (0.1% to 1%): Soft tissue calcification
Postmarketing reports: Dizziness[Ref]
More about PhosLo Gelcap (calcium acetate)
- Drug interactions
- Dosage information
- During pregnancy
- Reviews (1)
- Drug class: minerals and electrolytes
Related treatment guides
1. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
2. "Product Information. Phoslyra (calcium acetate)." Fresenius Medical Care North America (2015):
3. "Product Information. PhosLo (calcium acetate)." Braintree (2001):
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.