Can I Give My Dog Tagamet?

Yes, with care
Cimetidine is commonly referenced for dogs at published doses. The published veterinary reference range for cimetidine in dogs is 5-10 mg per kg of body weight, given every 8-12h. Older antacid; famotidine usually preferred (fewer drug interactions).
Source: Merck Veterinary Manual
Get the exact range for your dog's weight

Skip it or ask a vet first if

many drug interactionskidney disease

Published range by weight

WeightCimetidine (published range)
10 lb dog23-45 mg
25 lb dog57-113 mg
50 lb dog113-227 mg
75 lb dog170-340 mg

Computed from the published 5-10 mg/kg reference range, every 8-12h. Product strengths rarely split evenly, so round DOWN to the nearest practical dose and confirm with your vet.

About Cimetidine

Cimetidine is an acid reducer, a class used for stomach upset and reflux. You will see it sold as Tagamet, and the label strength on the box is what matters for the math, not the brand. Reference data on this page reflects published veterinary sources, not a prescription for your dog.

What to have ready when you call the vet

Whether you are confirming a dose or reporting that your dog already got into something, the call goes faster with four facts ready: your dog's current weight, the exact product name and strength from the label, how much was given or eaten, and roughly when. With those, most clinics can answer in one call.

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.

See also

Other antacid / GI questions for dogs