Are Tums Safe During Pregnancy

Status

caution Last reviewed: 2026-05-16 · Confidence: moderate

Reason

Pregnancy use is generally used as directed, but dosing limits apply and high doses can cause maternal side effects.

Drug Information

Brand Name
Tums
Generic Name
calcium carbonate
Drug Class
Antacid (calcium salt)
FDA Category
N/A (PLLR narrative label)
Rx Status
OTC

Safe Amount

Dosage must be determined by your provider based on individual risk/benefit. Follow the package label; do not exceed the labeled maximum.

Effects

Pregnancy
OTC antacid option in pregnancy; avoid exceeding label directions and do not use long-term high doses without clinician advice.
Mother
Can cause constipation and, at high doses, high calcium levels or kidney stones.
Baby
Used as directed and within recommended amounts, it is not expected to increase birth defects or preterm birth risk.

Trimester Notes

1st Trimester
Used as directed and within recommended amounts, it is not expected to increase miscarriage or birth defect risk above background.
2nd Trimester
Used as directed and within recommended amounts, it is not expected to increase pregnancy complications.
3rd Trimester
No special third-trimester warning in official pregnancy information, but avoid high or long-term dosing.

Conditions & Warnings

  • Consult OB/GYN or prescriber
  • Pregnancy dosing limits may apply
  • Use only as directed on the label

Alternatives

  • Lifestyle changes for heartburn
  • Other calcium-, aluminum-, or magnesium-containing antacids only if your clinician approves

References

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