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Metoclopramide is a prescription medication in the phenothiazine class, which vets sometimes prescribe for nausea in canines. It’s especially effective at reducing nausea in dogs undergoing chemotherapy. Phenothiazines act on the nervous system to stop the production of chemical messengers that cause nausea and vomiting.
In addition to its neurological activity, metoclopramide also stimulates movement in the bowels and causes the stomach to contract. These physiological effects aid digestion and prevent food from backing up into the esophagus, making it harder to regurgitate.
This medication is sometimes given off-label to induce lactation in nursing dogs with low or no milk supply. Metoclopramide’s lactation-inducing abilities stem from its action as a dopamine receptor antagonist. One function of dopamine is to control the body’s levels of prolactin (the hormone responsible for milk production). By preventing dopamine from binding to the receptors, metoclopramide enables the body to produce more prolactin (and thus more milk) without inhibition.
The standard dosage of metoclopramide for dogs is 0.1 to 0.2 mg per lb of body weight, 2 to 4 times daily.
This medication is available as an injectable solution, oral solution, and 5 mg and 10 mg oral tablets. Most vets prescribe the tablet form for canines since it doesn’t contain artificial sweeteners and is easier to administer than other formulations.
Crush the metoclopramide tablet and mix it thoroughly into wet food. You’ll need to give this medication every 6 to 8 hours or according to your vet’s recommendation. Your vet may instruct you to administer metoclopramide 30 minutes before feeding your dog to help them keep food down.
Depending on your pet’s size, you may have to divide the pill into segments before crushing to ensure the right dose.
A separate study determined that giving metoclopramide before administering intravenous opioids reduced nausea in the study group. Another study of dogs treated with cisplatin, a chemotherapy drug, found that metoclopramide was more effective at controlling nausea and vomiting in dogs than other phenothiazines.
Although side effects are usually mild, metoclopramide for dogs can cause an array of side effects in canines, including:
Trouble using the bathroom
Peeing more than usual
Seizures in dogs with epilepsy
Strange behavior or confusion
MAOIs, including some psychiatric and flea-preventative medications, can cause high blood pressure in dogs taking metoclopramide. Inform your vet of any antidepressants or flea preventatives (including flea collars) that your pet takes to make sure metoclopramide is safe.
Metoclopramide influences digestive motility, so it shouldn’t be given to dogs with gastrointestinal obstructions or internal bleeding.
Metoclopramide for dogs is known to interact with many different types of drugs, including:
Blood pressure drugs
Immunosuppressants (particularly cyclosporine)
Some dogs are sensitive to metoclopramide and experience adverse reactions — especially if they take an unusually strong dose. Seek immediate veterinary care if your dog shows symptoms like:
Extreme behavioral changes
Loss of consciousness
Unusual muscle movements
A metoclopramide allergy is different from hypersensitivity and is distinguishable by respiratory problems, hives, and swelling of the mouth, throat, face, or extremities. Don’t give this medication to dogs with a history of reactions to phenothiazines, para-aminobenzoic acid, or any of metoclopramide’s inactive ingredients.
Ask your vet before giving any over-the-counter medicines to your dog, since many human medications are toxic to other mammals. Tylenol, for instance, is safe for humans, but it can cause liver damage and even death in dogs. Some vets suggest Pepto-Bismol and Imodium for dogs with stomach upset, but you should run it by your vet before giving these medications.
Call your vet if your dog repeatedly vomits after taking this medication — they may need a different antiemetic. Do not double up on your pet’s dose since this can cause serious complications.
This medication should be kept between 68 and 77 degrees Fahrenheit. Ensure the seal on the medication bottle is tight since moisture in the air may cause it to spoil or disintegrate.
Never give your dog more of this medication than your vet recommends.
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