WikiDrug / Digestive health / Calcium carbonate

Calcium carbonate chewable tablets for heartburn and acid indigestion relief

Overview

This product contains calcium carbonate as an antacid in chewable tablet form, designed to relieve symptoms of heartburn, acid indigestion, sour stomach, and associated upset stomach. Each chewable tablet delivers 1000 mg of calcium carbonate with 400 mg elemental calcium.

What is it used for?

  • Relief of heartburn in adults and children 12 years and older.
  • Relief of sour stomach and acid indigestion symptoms in the same population.
  • Management of upset stomach related to the above symptoms.

Active ingredients

Calcium Carbonate USP 1,000mg

How it works

Calcium carbonate works by neutralizing stomach acid, which helps to reduce irritation and discomfort caused by excessive acidity in the stomach.

Dosage and administration

Adults and children 12 years and over: Chew 2 to 3 tablets as symptoms occur or as directed by a healthcare provider. Do not exceed 7 tablets in 24 hours. Pregnant individuals should not exceed 5 tablets in 24 hours. Use at the maximum dosage for no more than 2 weeks unless advised and supervised by a doctor. Do not use for symptoms persisting longer than 2 weeks without medical advice.

Warnings and precautions

  • Consult a doctor or pharmacist before use if currently taking a prescription medication, as antacids may interfere with certain drugs.
  • Do not exceed recommended dosage limits, particularly during pregnancy.
  • Do not use the maximum dosage for more than two weeks without medical supervision.
  • If symptoms persist beyond two weeks, seek medical advice.

Drug interactions

Antacids like calcium carbonate can interact with certain prescription drugs; consult a healthcare professional if you are taking other medications.

Pregnancy and breastfeeding

Pregnancy: Do not exceed 5 tablets within 24 hours during pregnancy.

Storage

Store at room temperature. Keep the container tightly closed.

Manufacturer(s)

Medical references

  • U.S. National Library of Medicine – DailyMed
  • Official prescribing information
  • Other authoritative medical references, where applicable

References are used to support the medical information presented on this page.

Medical information disclaimer

The information on WikiDrug is provided for educational and informational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making decisions about medication use.

Last updated November 4, 2026