Also sold as calcium carbonate, Rolaids (different salts), Tums Ultra, Tums Smoothies
This drug does have veterinary uses, but the product and the amount have to be chosen by a vet who knows your dog. There is no at-home dose.
Tums is calcium carbonate, an antacid, and a dog that eats a couple is usually facing stomach upset rather than poisoning. That is not the same as it being a good idea: it does very little for the things that actually cause canine stomach upset, and using it can delay finding out what is wrong. Check the label for xylitol before anything else.
Part of Stomach and digestive medication on our medication safety hub.
Part of our guide to My Dog Ate Tums: Flavor, Dose, and Bottle Check.
Do not wait for symptoms and do not wait until you have filled in the form below. Call first, then use the checklist while you are on the phone.
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Exposure details to have ready
These are the questions a veterinarian or poison-control operator will ask. Fill in what you know and leave the rest blank. This tool does not estimate a dose or a risk score: medication risk depends on the exact ingredient, strength, and formulation, so the assessment has to come from the clinician on the call.
- Keep the package, blister pack, or prescription bottle. The strength and the full ingredient list are what make the advice specific.
- Do not induce vomiting unless a veterinarian or poison-control professional tells you to. It is the wrong move for several medications and can cause harm on its own.
- Do not give milk, food, salt, hydrogen peroxide, or any home remedy on your own.
- Do not give a second dose of anything to make up for one you think was missed.
- Count what is left in the packet, so the number missing can be worked out.
Your exposure summary
Read this down the phone or paste it into a message to your vet. It stays on your device; nothing here is sent to DogSafe.
Why Tums needs caution
Calcium carbonate neutralizes stomach acid, and excess calcium is not well absorbed, so a small accidental amount tends to cause loose stools or constipation rather than serious harm. The reasons for caution are different from toxicity: most canine vomiting is not an acid problem, so the antacid treats the wrong thing; large amounts disturb calcium balance and can affect dogs with kidney or heart disease; and some flavoured chewable antacids use xylitol, which is genuinely dangerous to dogs and needs immediate action.
Part of the Human Medicine Exposures guide
For related dog-safety questions and product-by-product answers, see the complete human medicine exposures guide.
Check for xylitol before anything else
Some chewable and sugar-free antacids are sweetened with xylitol, which causes a sudden drop in blood sugar in dogs and can injure the liver. It is the one thing about an antacid packet that turns a minor event into an urgent one. If xylitol, or 'sugar alcohol' with xylitol named, appears on the label, call straight away.
Why vets usually reach for something else
Antacids like Tums work briefly and only on acid. The common causes of a dog vomiting (dietary indiscretion, parasites, pancreatitis, a foreign body, kidney disease) are not acid problems, and none of them improve because the acid was neutralized. A dog that seems to need daily antacids needs a diagnosis instead.
Dogs that should not have it at all
Dogs with kidney disease, dogs with heart disease or on heart medication, and dogs already on a calcium or vitamin D supplement have the least room for an unplanned calcium load. Mention any of these on the call.
Signs to watch for
Usually little; loose stools or constipation; with large amounts, vomiting, weakness or increased thirst. Xylitol-containing products can cause weakness, wobbliness or collapse from low blood sugar
Related items
Check the exact item or ingredient before assuming two similar exposures carry the same risk.
What to do next
Read the full ingredient panel first and check for xylitol. Then note the number eaten and the time, and call if anything above applies.
🚨Step-by-step: what to do in the first 10 minutes →Available 24/7. A consultation fee may apply.
A closer look at tums
Calcium carbonate neutralizes stomach acid, and excess calcium is not well absorbed, so a small accidental amount tends to cause loose stools or constipation rather than serious harm. The reasons for caution are different from toxicity: most canine vomiting is not an acid problem, so the antacid treats the wrong thing; large amounts disturb calcium balance and can affect dogs with kidney or heart disease; and some flavoured chewable antacids use xylitol, which is genuinely dangerous to dogs and needs immediate action. The details below use the specific facts for this exposure, rather than treating it like every other medication question.
1. Start with the exact exposure
For a closely related comparison, read Omeprazole (Prilosec). This page gives no dose. Where a vet wants a dog on an antacid they usually choose a different drug, because the ones that work for dogs are not usually the ones on the human antacid shelf. If your vet has told you to give Tums, follow their amount, not the human packet.
2. Use the facts to decide whether to monitor or call
Another helpful reference is Human Medicine Exposures. For one or two plain calcium-carbonate tablets in a healthy dog, with no xylitol on the label, offer water and watch for loose stools. That is monitoring an accident, not treating the stomach upset. If your dog is unwell enough that you were reaching for an antacid, the underlying problem is the thing to call about. Call promptly if the label lists xylitol, if a large number were eaten, if your dog has kidney or heart disease or is on heart medication, if vomiting continues, or if there is blood in the vomit or stool, black tarry stools, or a painful belly.
3. If the details are uncertain
Follow the first 10 minutes guide. Read the full ingredient panel first and check for xylitol. Then note the number eaten and the time, and call if anything above applies.
FAQ
This page gives no dose. Where a vet wants a dog on an antacid they usually choose a different drug, because the ones that work for dogs are not usually the ones on the human antacid shelf. If your vet has told you to give Tums, follow their amount, not the human packet.
For one or two plain calcium-carbonate tablets in a healthy dog, with no xylitol on the label, offer water and watch for loose stools. That is monitoring an accident, not treating the stomach upset. If your dog is unwell enough that you were reaching for an antacid, the underlying problem is the thing to call about.
Call promptly if the label lists xylitol, if a large number were eaten, if your dog has kidney or heart disease or is on heart medication, if vomiting continues, or if there is blood in the vomit or stool, black tarry stools, or a painful belly.
Only if your vet tells you to. It does little for the causes of most canine stomach upset, the dose that would help a dog is not the human dose, and giving it can delay proper treatment. Call your vet before using any human antacid.
Check the label for xylitol first and call immediately if it is there. Otherwise call your vet with the number eaten and your dog's weight: a whole roll is a large calcium load, and it matters more for a small dog or one with kidney or heart disease.
Reflux in dogs is diagnosed and managed by a vet, usually with medication chosen for dogs rather than a human antacid. Treating suspected reflux at home with Tums risks managing a symptom while the actual cause continues.
- ASPCA Animal Poison Control Center — human medications and xylitol-containing products
- Merck Veterinary Manual — poisonings from human prescription and over-the-counter drugs
- Pet Poison Helpline — top 10 human medications poisonous to pets
- ASPCA Animal Poison Control
- Merck Veterinary Manual: Poisonings from human prescription drugs
- Pet Poison Helpline: Top 10 human medications poisonous to pets