Calcium carbonate (Tums) can be used short-term for mild dog stomach upset, but is not recommended as a regular treatment. Tums can interfere with calcium absorption, change stomach pH, and many flavoured varieties contain xylitol. Vet-recommended GI treatments are always preferable.
⚠️ Always consult your vet
Never give human medications to pets without veterinary guidance. Dosing errors can be dangerous.
Dose Guide by Weight
General reference ranges only. Always confirm with your vet before giving.
| Dog Size | Dose | Frequency |
|---|---|---|
| Any flavoured variety | Check label first | Never if xylitol listed |
| Under 25 lbs | ½ regular-strength (400mg) | No more than 1–2 doses |
| 25–60 lbs | 1 regular-strength (500mg) | No more than 1–2 doses |
| Over 60 lbs | 1–2 regular-strength | No more than 1–2 doses |
ℹ️ Use only for occasional short-term GI upset — not as a regular supplement. Calcium carbonate can interfere with absorption of other medications and minerals if used chronically.
Never Use These
- Any Tums or antacid containing xylitol — check every label
- Long-term or daily use — disrupts calcium balance
- Dogs with kidney disease — calcium carbonate can worsen kidney stones
- Dogs on tetracycline antibiotics — antacids block absorption
- Fruit-flavoured varieties which often contain artificial sweeteners
Potential Uses
- Short-term occasional stomach acid upset
- Not recommended as a calcium supplement — imbalanced ratio with phosphorus
- Never as a substitute for vet-diagnosed GI treatment
Side Effects to Monitor
Frequently Asked Questions
In small, occasional doses it's generally not harmful. But it's not an effective or appropriate treatment for most dog GI issues. Plain boiled chicken and rice or a vet-recommended probiotic works better.
Several flavoured Tums varieties contain xylitol. Always check the full ingredient list. Regular unflavoured or mint-flavoured are lower risk — but still verify.
For simple gas, simethicone-based products (Gas-X) are safer. Tums won't help most gas issues. A vet visit is appropriate if gas pain is severe or recurrent.
Yes — plain boiled chicken and rice, plain pumpkin puree, or a veterinary-prescribed GI diet. For persistent GI issues, a vet should assess the underlying cause.
Occasionally for mild, infrequent cases. Recurrent acid reflux in dogs is a veterinary condition that needs proper diagnosis — not ongoing antacid treatment.