Dr.pharmacist
Tums

Tums

calcium carbonate

OTC DrugTums
Reviewed by Younghun Cho

Pharmacist's Verdict

Tums is a reliable and fast-acting over-the-counter antacid that works well for quick relief of occasional heartburn and indigestion, but it's not meant for daily or long-term use.

Ingredient Analysis

CALCIUM CARBONATE

Pros & Cons

Pros

  • Provides very fast relief for occasional heartburn and upset stomach by neutralizing stomach acid.
  • Widely available and generally affordable, making it an accessible option for many.
  • Can be used by pregnant individuals, but always follow the doctor's advice on dosage and duration.
  • The active ingredient, calcium carbonate, also provides a small amount of dietary calcium.

Cons

  • Only offers temporary relief and does not address the underlying cause of frequent heartburn.
  • Can cause constipation in some people, especially with higher doses.
  • Interacts with many common prescription drugs, including certain antibiotics, thyroid hormones, and iron supplements, reducing their absorption.
  • Taking too much (more than 6 tablets in 24 hours) or using it for more than two weeks can lead to too much calcium in the body, which can be harmful.

Safety Information

Warnings

Warnings Ask a doctor or pharmacist before use if you are presently taking a prescription drug. Antacids may interact with certain prescription drugs. When using this product • do not take more than 6 tablets in 24 hours • if pregnant do not take more than 6 tablets in 24 hours • do not use the maximum dosage for more than 2 weeks, except under the advice and supervision of a doctor Keep out of reach of children.

Is Tums safe for you?

See pregnancy, interactions, and common concerns answered in our pharmacist safety FAQ.

Read safety review →

References

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    FDA DailyMed: EMF Protect and Balance · FDA

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    FDA DailyMed: Tums Chewy Bites Orange and Cream ES · FDA

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    Gafni RI, Collins MT, The New England journal of medicine, 2019 · PubMed

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    A review of biomineralization in healing concrete: Mechanism, biodiversity, and application.

    Zhang J, Deng J, He Y, et al., The Science of the total environment, 2024 · PubMed

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    Calcium Carbonate.

    Al Omari MM, Rashid IS, Qinna NA, et al., Profiles of drug substances, excipients, and related methodology, 2016 · PubMed