Calcium carbonate
TUMS
What it isCalcium salt acting as an antacid and supplement.
Why this oneCheapest calcium source and best absorbed with food, and it doubles as an antacid and phosphate binder.
What limits itIt needs gastric acid, so citrate is preferred on a PPI. Constipation; it binds levothyroxine and quinolones.
FDA-approved for
- antacid
- calcium supplementation
FDA label
Read the full label on DailyMed ↗
| FDA dosing | Population | Start | Target | Max |
|---|---|---|---|---|
| Acid indigestion / heartburn (OTC antacid) | Adults & children ≥12 y | Chew 2–4 tablets PRN as symptoms occur | Chew 2–4 tablets PRN as symptoms occur | Not stated on label |
Renal Undefined
Hepatic Undefined
Instructions
- Chew tablets completely — do not swallow whole.
- Do not use for symptoms persisting >2 weeks unless advised by a doctor.
- Children <12 y: dose only as directed by a doctor (no OTC dose given).
Pregnancy Undefined
Lactation Undefined
NO BOXED WARNINGS
Principal riskConstipation; binds other drugs in the gut
Classes and tags
Clinical profile
Mechanism of action: Calcium carbonate ballicule
