Cimetidine 800mg (100 Tabs) | On Sale | EntirelyPets Rx
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Cimetidine (Generic) Tablets, 800-mg, 100 tablets

Item# IWM035588
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Recurring Saings in EprxAUTOSHIP & SAVE[Details]
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Cimetidine is prescribed to limit the production of stomach acid by blocking the action of histamine. It helps to treat ulcers that have already formed and helps to prevent future ulcers from forming. Cimetidine is also used in the treatment of gastritis (inflammation of the stomach), esophagitis (inflammation of the esophagus) and gastric or esophageal reflux. Customers may receive this drug under the name Tagamet.


Cimetidine is indicated for the treatment of specific ulcers, acid reflux diseases and heartburn. It may also be used to help prevent gastrointestinal bleeding.

Possible Side Effects

Symptomatic response to treatment with cimetidine does not preclude the presence of a gastric malignancy. There have been rare reports of temporary healing of gastric ulcers despite subsequently documented malignancy.


Cimetidine is available in 100 mg, 150 mg, 200 mg and 300 mg tablets liquid form of 300mg per 5ml and injectable form. The normal dose is 3 to 5 mg per pound, administered orally every six to eight hours. The dosage could be changed depending on the specific condition to be treated. Make sure to complete the course to prevent relapse.

Follow your Veterinarian's prescription and instructions for your pet.


Though it is relatively safe to use under the supervision of a veterinarian, cimetidine could cause side effects in some animals. Make sure that the pet is not hypersensitive to this drug before administering Cimetidine animals with liver or kidney disease should be treated with utmost caution. Cimetidine can interact with other medications such as antacids, metoclopramide, sucralfate, digoxin and diazepam. Be careful while administering this drug in older pets or those with blood diseases.

Though Cimetidine is not approved for use in animals, it could be legally prescribed by veterinarians as an extra-label drug. Cimetidine is used in dogs and cats to treat mast cell tumors, gastritis inflammation of the stomach, esophagitis inflammation of the esophagus, and gastric or esophageal reflux.Chronic cimetidine therapy is found to be beneficial for uremic dogs under hemodialysis, to suppress the circulating concentrations of immuno reactive parathyroid hormone.

Side Effect:

Serious side effects are generally not prevalent however contact the veterinarian if the animal develops labored breathing or rapid heartbeat during the course of treatment with cimetidine. Cimetidine overdosage might result in tachycardia and respiratory failure, and should these symptoms persist, respiratory support and beta-adrenergic blockers should be used.


Clinical experience with cimetidine overdosage is limited. In laboratory animals, very high dosages have been associated with tachycardia and respiratory failure. Respiratory support and beta-adrenergic blockers have been suggested for use should these symptoms occur.


Store at temperatures from 68° - 77°F.


Cimetidine is used for the treatment of duodenal ulcers, active gastric ulcers, gastroesophageal reflux disease , pathological hypersecretory conditions , heartburn and the prevention of gastrointestinal bleeding.
Cimetidine is intended for horse, cat, and dog use only.


  • Can be used to treat esophagitis and gastritis
  • Reduces acid production in the stomach
  • Prevents ulcers from forming
  • Treats existing ulcers

Cimetidine works by limiting acid production in the stomach through the blockage of histamine action. It helps prevent ulcers from forming while also treating ulcers that have already formed.

It can also treat:

  • Esophageal reflux
  • Gastric reflux
  • Esophagitis (inflammation of the esophagus)
  • Gastritis (inflammation of the stomach)
Cimetidine does not have any known side effects.

In rare cases, gastric ulcers have healed temporarily despite documented subsequent malignancy. A symptomatic response to cimetidine treatment doesn't preclude gastric malignancy presence.

This is an FDA-approved drug for use in humans. Such drugs are commonly prescribed for horses, cats, and dogs.

Immediately contact your closest emergency animal hospital.

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