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$0.45 $0.30 per tablet
Ships in one business day or less

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150 mg Tabs
Price w/coupon SAVE20
$0.45 $0.30 per tablet
Ships in one business day or less

Step 1. Select a Tablet Size:

150 mg Tabs
Price w/coupon SAVE20

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Product Info

What is Ranitidine?

Ranitidine is an acid reducer that treats ulcers in the stomach and intestines. Ranitidine reduces stomach acid allowing for existing ulcers to heal, and may also prevent ulcers from forming. Ranitidine is not FDA approved for use in veterinary medicine; however, it is a commonly accepted practice for veterinarians to prescribe this medication for dogs and cats. In addition, Ranitidine is quite frequently used to treat ulcers in horses. Ranitidine requires a prescription from your veterinarian.


Dogs, Cats & Horses


  • Treats and prevents ulcers of the stomach and intestines
  • Reduces stomach acid
  • Easy-to-administer tablet

How does Ranitidine work?

Ranitidine blocks the histamine H-2 receptor that stimulates stomach acid secretion, which reduces the irritation of existing ulcers, and may prevent new ulcers from forming.


Do not give to dogs and cats with liver or kidney disease.

Brand Name:


Generic Name:

Ranitidine 150 mg

What is the most important thing I should know about Ranitidine?

Ranitidine is an H2 receptor antagonist. H2 receptor antagonists are use to reduce the production of stomach acid. Ranitidine aids in the healing of stomach ulcers and stomach ulcer formation. Ranitidine is also used to treat gastritis, esophagitis, and GERD. Ranitidine may also be used for purposes other than those listed here. Ranitidine is a prescription medication not FDA approved for veterinary use; however, it is a commonly accepted practice for veterinarians to use this medication in dogs and cats to reduce the amount of stomach acid produced. In addition, it is often used in the treatment of ulcers in horses. The usual dose in dogs and cats is 0.25 to 1 mg/lb, every 8 to 12 hours. The usual dose in horses is 5-10 mg/kg 2 to 4 times a day.

What should I discuss with my veterinarian before giving Ranitidine to my pet?

Tell your veterinarian if your pet has heart, liver, or kidney disease. Tell your veterinarian if your pet is pregnant since it may affect weight gain.

How should Ranitidine be given?

Give this medication exactly as directed by your veterinarian. If you do not understand the directions ask the pharmacist or veterinarian to explain them to you. Ranitidine should not be given with food. Food will decrease its effectiveness. Store Ranitidine at room temperature away from moisture and light. Keep this medication away from children and pets.

What are the potential side effects of Ranitidine?

For dogs and cats, if any of the following serious side effects occur, stop giving Ranitidine and seek emergency veterinary medical attention: an allergic reaction (difficulty breathing; swelling of the lips, tongue or face; hives). Side effects are rare but may include diarrhea or irregular heartbeat. Other side effects may also occur. Talk to your veterinarian about any side effect that seems unusual or bothersome to your pet.

What happens if I miss giving a dose of Ranitidine?

Give the missed dose as soon as you remember during the same day. However, if you don't remember until the next day, skip the dose you missed and give only the next regularly scheduled dose. Do not give a double dose of the medication.

What happens if I overdose my pet on Ranitidine?

Overdose is rare. If overdose is suspected, seek emergency veterinary medical treatment. Symptoms of Ranitidine overdose may include vomiting, diarrhea, irregular heartbeat, muscle tremors, and rapid breathing.

What should I avoid while giving Ranitidine to my pet?

Ranitidine should not be used in pets allergic to it. Use Ranitidine with caution in pets with heart, kidney, or liver disease. Use with caution in pregnant females.

What other drugs will affect Ranitidine?

Tell your veterinarian if your pet is being given antacids, acetaminophen, ketoconazole or itraconazole, metoprolol, nifedipine, propantheline, and long term use of Vitamin B12, as interactions can occur. Give Ranitidine 2 hours before or 2 hours after the other medications. When given with azathioprine, Ranitidine may further decrease white blood cell counts. Drugs other than those listed may also interact with Ranitidine. Talk to your veterinarian or pharmacist before giving any prescription or over the counter medicines including vitamins, and supplements.

How to Use

Ranitidine Directions:

  • Always consult with your veterinarian before giving medication.
  • Many veterinarian prescribe this medication to treat ulcers in horses. It is used this way quite frequently.

Simplify giving your pet Ranitidine with Pill Pockets.

All weights
Usual dosage: 0.25 to 1 mg/lb, every 8 to 12 hours.
All Weights
Usual dosage: 5-10 mg /kg 2 to 4 times a day.

Ranitidine Ingredients:

Active Ingredients
Ranitidine 150 mg
Customer Reviews

Is this the same as over the counter medicine

Asked by: Farm
Yes, ranitidine is an over the counter human medication that is also prescribed for pets.
Answered by: Lisa M
Date published: 2017-10-11

Is this pricing for a bottle of 60 tablets or for one individual tablet?

Asked by: JDubs
This medication is sold by pill.
Answered by: Laura PetMed Pro
Date published: 2016-03-09

Dosing for small dogs?

My vet recommended an H2 blocker for my 8-lb dog. But the smallest dose available is a 75-mg tablet. Even cut in half, the dose would be 4x the recommended dosing of 1mg per lb. Is it safe to give him so much?
Asked by: Sarah
Dissolve your tablets into cooled boiled water. In your case you want a solution with a strength of 8mg/ml for your 8 lb dog. So grind the tablet into powder by breaking it into small pieces then grind the pieces between two teaspoons into powder. Mix the powder with 9ml of the water which will give you 9 x 1ml doses of 8.33mg (for each tablet you use). Use a plastic syringe with a scale to measure the water to mix with the powder. Once you have the solution mixed keep it in a small medicine bottle with a screw top so that you can shake it before use. Draw 1 ml of the solution into the syringe and squirt it into dogs' mouth. Hope this makes sense.
Answered by: Kevin
Date published: 2016-12-24

Which is safer for dogs to take for GERD, Zantac or famotidine?

Asked by: Erin
the famotidine is used way more often but it is up to the vet to really decide the best one for your pet
Answered by: Linda petmeds pharmacist
Date published: 2014-04-02

Why dors our cat immediately foam at mouth when given ranitidine ?

ranitidine was prescribed by a vet to be given 2 times a day, in liquid form and give 1 ml onto cats mouth.
Asked by: brent
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