Ranitidine and Pets
Find out if Ranitidine is toxic to dogs and cats.
Think your pet ate something toxic?
Call ASPCA Animal Poison Control Center: (888) 426-4435 or view emergency guide
Ranitidine is an H2 receptor antagonist that reduces stomach acid production. It is sold over-the-counter under the brand name Zantac and as generic ranitidine, and it is sometimes used off-label in dogs and cats for stomach upset, reflux, or ulcers. While the active ingredient is generally considered low in toxicity, pets should never receive human medications without a veterinarian’s approval.
In dogs, accidental swallowing of one or two tablets is unlikely to cause serious problems, though stomach upset or drowsiness can occur. Cats are more sensitive and may develop vomiting, diarrhea, restlessness, or tremors even at lower doses. Some formulations may also contain sweeteners such as xylitol, which is highly toxic to dogs, so always check the inactive ingredients.
Keep all ranitidine products in a closed cabinet, out of reach of pets and children. If you suspect your dog or cat has eaten ranitidine, contact your veterinarian or a pet poison control center right away with the bottle strength, number of tablets, and the time of ingestion.
Is Ranitidine Toxic to Dogs?
Ranitidine may be used off-label in dogs under veterinary guidance, and accidental ingestion of small amounts is usually low risk. Large ingestions or dogs with liver, heart, or seizure disorders may experience more serious effects.
Is Ranitidine Toxic to Cats?
Cats metabolize ranitidine differently and are more sensitive than dogs. It should only be given under veterinary supervision; accidental ingestions can cause vomiting, diarrhea, agitation, or tremors.
Active Ingredients
- ranitidine
Common Brand Names
- Zantac
- generic ranitidine
Dosage Form
tabletsyrupeffervescent tablet
Common Uses
- heartburn
- GERD
- stomach ulcers
- off-label treatment of gastric irritation or reflux in pets under veterinary guidance
Toxic Ingredients
- ranitidine
- note: some ranitidine products have been recalled due to potential NDMA contamination; the active ingredient itself is generally low toxicity
Symptoms to Watch For
- vomiting
- diarrhea
- loss of appetite
- lethargy
- agitation or restlessness
- tremors
- rapid breathing
- dilated pupils
- irregular heartbeat (rare)
What If My Pet Was Exposed to Ranitidine?
Call your veterinarian or a pet poison control center (ASPCA APCC or Pet Poison Helpline). Provide the product strength, amount, and timing; watch for vomiting, diarrhea, agitation, or tremors. Do not induce vomiting unless directed by a professional.
Safer Alternatives
Sources
Vet's Note
PetPilot provides general information for educational purposes. While we reference authoritative veterinary organizations, this page has not been individually reviewed by a veterinarian for your specific pet. Individual animals may react differently based on age, weight, breed, health conditions, and amount consumed. Always consult your veterinarian or a poison control center for personalized advice, especially if your pet is ill, injured, pregnant, nursing, or on medication.