Give famotidine (Pepcid) at 0.25–0.5 mg per pound of body weight every 12–24 hours—about 10 mg for a 20–40 lb dog, but always check with your vet first.
How much Pepcid should I give my dog?
Most dogs need 0.25–0.5 mg of famotidine per pound every 12–24 hours, says the AKC, and giving it an hour before meals helps it absorb better.
Say your dog weighs 30 pounds—that’s 7.5–15 mg per dose. Double-check the tablet size (10 mg, 20 mg, or 40 mg) and timing with your vet to avoid giving too little or too much. For tiny pups under 10 lbs, liquid Pepcid makes dosing easier and more precise.
Can I give my dog 20 mg Pepcid?
Yes—a 20 mg tablet is fine for dogs when you match it to their weight, using the usual 0.25–0.5 mg per pound every 12–24 hours.
A 20 mg dose fits a 40–80 lb dog, depending on how often you give it. Never split tablets unless your vet says the specific brand is safe to split. Always pick a product labeled for animals or get your vet’s go-ahead before using human versions.
Can you give a dog too much Pepcid?
Famotidine is safe, but way too much can still cause trouble, like tiredness, throwing up, diarrhea, a weird heartbeat, low blood pressure, or trouble breathing.
If you think you’ve overdosed or see scary symptoms, call your vet or an emergency animal clinic right away. Jot down when and how much you gave so they can help faster. Never give another dose until your vet says it’s okay.
Will Pepcid hurt my dog?
Pepcid (famotidine) is one of the few human over-the-counter meds that’s generally safe for dogs, according to the ASPCA.
Still, use it only with your vet’s okay to make sure the dose fits your dog’s size and to rule out anything more serious than acid reflux or an upset stomach. Skip human painkillers like Tylenol or ibuprofen—they’re poison to dogs.
How fast does Pepcid work in dogs?
Famotidine usually kicks in within 1–2 hours, with peak effects around 2–4 hours, based on veterinary pharmacology references.
You might not see your dog stop vomiting right away, so lab work or follow-up visits can help track whether it’s working. Watch how your dog acts and tell your vet if things get worse instead of better.
How much Pepcid can I give my 10 pound dog?
A 10-pound dog needs 2.5–5 mg of famotidine every 12–24 hours, which is one-quarter to one-half of a 10 mg tablet.
Use a pill splitter or liquid form for accuracy in small breeds. Weigh your dog if you can—dosage depends on the real weight, not a guess. If symptoms don’t improve in 2–3 days, check back with your vet.
How much famotidine can I give my 10 lb dog?
The safe range is 0.22–0.44 mg per pound twice a day, so a 10 lb dog needs 2.2–4.4 mg per dose.
That’s roughly one-quarter to one-half of a 10 mg tablet. Always confirm the strength of liquid suspensions—some require different measurements. Run the dose by your vet to be sure it’s right for your pup.
What is the difference between Pepcid and Pepcid AC?
Both contain famotidine, but Pepcid AC adds calcium carbonate and magnesium hydroxide as extra antacids, according to the product labels.
Pepcid AC is made for human heartburn and sour stomach, while regular Pepcid is often used off-label in pets. For dogs, plain famotidine is usually the better pick unless your vet says otherwise. Always read the ingredient list before using.
Can I give my dog omeprazole 20 mg?
Vets commonly prescribe 20 mg omeprazole for dogs, especially for ulcers or acid reflux.
Watch for vomiting, diarrhea, or a dip in appetite. Don’t mix up omeprazole with omeprazole magnesium—stick to the formulation your vet recommends. Some small dogs need compounded meds for the right dose.
Can dogs take Pepcid and Benadryl together?
Yes—dogs can safely take famotidine (Pepcid) and diphenhydramine (Benadryl) at the same time if each is dosed correctly.
Space out the doses unless your vet says to give them together. Never add human pain relievers like ibuprofen or acetaminophen unless your vet explicitly approves it. Keep an eye out for extra sleepiness or an upset stomach.
How do you give famotidine to a dog?
Give famotidine on an empty stomach about an hour before feeding, or follow your vet’s exact instructions, using the right strength and form for your dog’s weight.
Swallow tablets whole; don’t crush or split unless your vet says it’s okay. Liquid forms can be mixed with a little water or food if needed, but try to keep the timing consistent so the drug stays effective.
Will Pepcid help my dog’s diarrhea?
No—famotidine won’t stop diarrhea and might even make it worse, according to veterinary sources.
Diarrhea needs supportive care: bland food like boiled chicken and rice, plenty of water, and a vet visit if it lasts or gets bloody. Pepcid is for acid-related issues like vomiting, not general tummy upset. If diarrhea goes past 24 hours, call your vet.
What antacid can you give a dog?
The top over-the-counter choices are famotidine (Pepcid) and omeprazole, and some versions don’t even need a prescription.
Cimetidine (Tagamet) and ranitidine (Zantac) are options, though Zantac isn’t widely recommended anymore due to safety and availability issues. Always run any antacid plan by your vet first to confirm the diagnosis and dose.
Can I give my dog Pepcid every day?
Daily Pepcid is okay, but only with your vet’s okay and for a short time, because long-term use can hide symptoms or cause side effects.
Chronic acid problems need a full workup, not just symptom relief. Pepcid works best on an empty stomach, so timing counts. Don’t go beyond the recommended schedule without your vet’s green light.
Can you crush Pepcid?
Don’t crush Pepcid tablets unless your vet tells you it’s safe—most pills are meant to be swallowed whole.
Crushing can mess with how the drug is absorbed or raise side-effect risks. If your dog refuses pills, ask your vet about liquid or gel versions instead. Always follow the label and your vet’s advice.
What can I give my dog for vomiting and diarrhea?
Start with easy-to-digest food like boiled chicken and rice, plain pumpkin, or bone broth, and keep your dog hydrated, but head to the vet if it doesn’t clear up in 24 hours or gets worse.
Small, frequent meals help settle the stomach. Skip rich, spicy, or processed foods. If vomiting or diarrhea drags on, or if your dog acts lethargic, gets dehydrated, or shows blood, get to the vet fast. Unless your vet says otherwise, don’t withhold water.
Edited and fact-checked by the FixAnswer editorial team.
