Supplement
Calcium Carbonate
Tablet
Quick Summary
Calcium is needed for strong bones, nerves and muscles.
Osteoporosis
Low calcium intake
Pregnancy
Medical Uses
Osteoporosis: With other treatment.
Low calcium intake: Supplementation.
Pregnancy: As advised.
How it's taken
Take with food for better absorption.
Your doctor decides the right dose for you and how long to take it.
Your doctor decides the right dose for you. Follow their instructions and the label.
Common Side Effects
Constipation
Common.
Bloating
Sometimes.
Kidney stones
Rarely with high amounts.
Interactions
Thyroid medicine, iron and some antibiotics
Take at different times.
Critical Warnings
Don't exceed advice
Too much calcium can be harmful.
Kidney problems
Ask your doctor.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Calcium Carbonate: drug information(opens in a new tab) · MedlinePlus, US National Library of Medicine