Imodium is a medication that can be used to treat dogs with diarrhea. Imodium is actually a brand name for a drug called loperamide. It works by slowing down movement in the intestines, allowing the intestinal walls to absorb electrolytes and water and preventing food from moving through the intestines too quickly.

Even though it’s sold as an over-the-counter medicine, you shouldn’t give it to your dog unless your veterinarian says it’s safe. Some dogs have a hard time breaking down the drug, and certain medical conditions may be worsened by Imodium. Closely follow your vet’s instructions for dosage and administering the medication. Here’s what you should know about the uses, dosage, and side effects of Imodium for dogs.


Imodium (generically known as loperamide) is a synthetic opioid. All opioids (think morphine, oxycodone, etc.) have a well-earned reputation for causing constipation. Loperamide is so good at causing constipation that this “side effect” has become the primary reason we use it as a medication. On the other hand, Imodium is not very good at relieving pain, at least at safe dosage levels, so it is never legitimately used for this reason.

Side effects

The most common side effects include constipation, bloat, and sleepiness. Dogs with the MDR1 genetic mutation (see risk factors) can become very sedated. This short-acting medication should stop working within 24 hours.

Uses Of Imodium For Dogs

Imodium is primarily used to treat diarrhea in dogs, though it can also be used to treat acute colitis, irritable bowel syndrome, and malabsorption/maldigestion. However, dogs should not take it to treat diarrhea that may be caused by an infection or by ingestion of toxins like poisonous mushrooms. Diarrhea is the body’s natural method of removing these harmful substances. Therefore, stopping the diarrhea might actually not be beneficial in those cases. This is why you should consult your vet so they can determine the cause of your dog’s diarrhea and prescribe treatment accordingly.

Dosage Of Imodium For Dogs

The following is a guideline for typical use of the drug in dogs. It must not replace your veterinarian’s advice for your individual pet. The usual dosage of Imodium for dogs depends on which form of the medication you are using. With the liquid form of Imodium A-D, dogs are usually given 0.3 to 0.6 mL per pound of weight two to three times per day. This is generally poured over dogs’ food.

For Imodium A-D caplets or EZ Chews, dogs should usually take one 2 mg caplet or chew for every 25 to 50 pounds of body weight two or three times per day. Imodium Multi-Symptom Relief has 2 mg of loperamide, but it also contains simethicone. This drug is also generally safe for dogs, and dogs should get one pill for every 25 to 50 pounds of weight. Your vet might wish to alter the dosage based on your dog’s reaction to the drug or their medical history. Follow your vet’s instructions closely.

Prices of Imodium For Dogs

$18.99 – $23.99 

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