Famotidine 20mg (per tab) | On Sale | EntirelyPets Rx
Licensed U.S. Pet Pharmacy | Verified Pharmacy
Mobile Menu
Search Submit
Live Chat My Account
View Cart 0
  • Product ImageProduct Image

Famotidine 20mg (per tab) (Manufacturer may vary)

Item# IWM029759
FREE SHIPPING Over $79! * Pet Food & Other Exclusions

Price too low to show

Add to cart to see low price
  1. We'll ask for your vet's info during check out.
  2. We'll verify your prescription and ship your order! Learn more >>
Recurring Saings in EprxAUTOSHIP & SAVE[Details]
Recurring Saings in EprxAUTOSHIP & SAVE[Details]
  • Description
  • Directions
  • FAQ
  • Reviews


Famotidine used to treat and prevent ulcers, treat conditions in which the stomach produces too much acid, gastroesophageal reflux disease (GERD), and heartburn caused by acid indigestion. If you pet has been diagnosed with an ulcer or problems with stomach acid, you veterinarian may prescribe an antacid such as famotidine.

Key Benefits

  • Treats or helps manage digestive disorders such as gastric or duodenal ulcers
  • Reduces gastric acid produced in the stomach
  • It is also used to treat gastritis and reflux conditions

How It Works

Famotidine blocks the action of histamine in the stomach. Histamine is a chemical released by the body that, in the stomach, causes more acid to be produced. By blocking histamine in the stomach, Famotidine reduces the amount of acid produced.


Give the oral form by mouth. Always follow the dosage instructions provided by your veterinarian. If you have difficulty giving the medication, contact your veterinarian.


Keep out of the reach of children and pets. Do not use in pets with known hypersensitivity to famotidine. Do not use in pregnant or lactating animals. Use caution in animals with kidney damage, liver damage, stomach cancer, or asthma. Famotidine may interact with some other medications. Inform your veterinarian of any and all medications your pet may be taking, especially certain antacids, metoclopramide, sucralfate, digoxin, or ketoconazole.


Do not administer this medication if a pet has a known allergy to Famotidine or other histamine blockers. Give Famotidine with extreme caution in older animals, animals with heart, liver, or kidney disease or pregnant animals. Famotidine can sometimes cause a low white blood cell count especially in animals that are taking other bone marrow suppressing drugs such as azathioprine.

This drug is FDA-approved for human use. However, it is common practice for veterinarians to prescribe such drugs for use in dogs and cats.

Possible Side Effects:

Famotidine is tolerated well in most pets, but a loss of appetite and lethargy have been reported. If a pet seems ill while taking Famotidine, call your veterinarian as soon as possible for further advice.


Tablets should be stored in well-closed, light-resistant containers at room temperature.


Signs may recur if a dose is missed. If you miss a dose, give it as soon as you remember. If it is almost time for the next dose, skip the one you missed and go back to the regular dosing schedule. Do not give two doses at once.

Notify your veterinarian of any other medications, including vitamins and supplements, your pet is taking while your pet is receiving Famotidine. Consult your veterinarian before using Famotidine with antacids, metoclopramide, sucralfate, digoxin, or ketoconazole, since interactions may occur.

Give the Famotidine 2 hours before or 2 hours after the other medication(s). Famotidine may decrease white blood cell counts, especially if given with other bone marrow suppressing drugs such as azathioprine.

Side effects are rare with Famotidine. You may see a loss of appetite and tiredness. If you observe these signs in your pet, contact your veterinarian.

If your pet experiences an allergic reaction to the medication, signs may include facial swelling, hives, scratching, sudden onset of diarrhea, vomiting, shock, seizures, pale gums, cold limbs, or coma. If you observe any of these signs, contact your veterinarian immediately.

Customers Who Bought Also Bought