Can I Give My Dog Tums?

Yes, with care
Calcium carbonate is commonly referenced for dogs at published doses. Published guidance for dogs: small dog: 250-500 mg; medium: 500-750 mg; large: 750-1250 mg, every 8-12h, short-term. Occasional heartburn only. Fruit-flavored versions fine; check label for xylitol in sugar-free lines.
Source: Veterinary Partner (VIN)
Get the exact range for your dog's weight

Skip it or ask a vet first if

xylitol-sweetened versionskidney diseasewith tetracyclines

The safe habit

Confirm any medication decision with your veterinarian, who knows your dog's health history and other medications. VetDose shows published reference data, not prescriptions.