Metoclopramide (Reglan) for Dogs: Uses, Dosage & Side Effects

See your vet immediately if your dog is vomiting repeatedly, has a swollen or painful belly, seems weak, cannot keep water down, vomits blood, or is trying to vomit without bringing anything up. Those signs can point to emergencies such as bloat, an intestinal blockage, or severe dehydration.

This article is for education only and is not a substitute for veterinary care. Metoclopramide should only be used under your vet's guidance because the right dose, timing, and formulation depend on your dog's weight, medical history, and the reason for vomiting or delayed stomach emptying.

This medication can be risky in dogs with a suspected gastrointestinal blockage, bleeding in the stomach or intestines, seizure history, head trauma, or certain endocrine conditions. Human medications should never be started at home without checking with your vet first.

Metoclopramide is a prescription medication your vet may use to help control nausea and vomiting and to improve movement in the upper digestive tract. It is a prokinetic drug, which means it helps food move from the stomach into the small intestine more effectively. It also has anti-nausea effects because it blocks dopamine activity in the brain's vomiting center.

In dogs, metoclopramide is commonly prescribed as an extra-label medication. That means it is approved for people, but veterinarians may legally prescribe it for pets when it fits the medical situation. This is common in veterinary medicine.

Metoclopramide tends to work best for problems involving the stomach and upper small intestine. It is not a cure for the underlying disease causing vomiting. Instead, it is one part of a treatment plan that may also include fluids, diet changes, imaging, bloodwork, or other medications depending on what your vet finds.

Your vet may prescribe metoclopramide for dogs with nausea, vomiting, reflux, or delayed stomach emptying. It is often considered when a dog is bringing up food long after eating, has regurgitation related to reflux, or needs help moving stomach contents forward more normally.

Common situations where your vet might consider it include gastroenteritis, pancreatitis support care, kidney disease-related nausea, post-anesthesia nausea, chronic gastritis, and some chemotherapy-related stomach upset. It may also be used when your vet suspects poor gastric motility is making symptoms worse.

Metoclopramide is not appropriate for every vomiting dog. If there is concern for a foreign body, intestinal blockage, stomach or intestinal bleeding, or certain neurologic conditions, your vet may choose a different plan. That is why vomiting should be evaluated before starting medication at home.

Metoclopramide dosing in dogs varies with the condition being treated, the route used, and your dog's overall health. A commonly referenced veterinary range is 0.1 to 0.5 mg/kg every 6 to 8 hours by mouth, under the skin, or by injection. Hospitalized dogs may receive a constant-rate IV infusion when steady control of nausea or gastric motility is needed.

Many dogs are given the oral medication before meals, especially when the goal is to improve stomach emptying. If stomach upset happens when given on an empty stomach, your vet may adjust timing or recommend giving it with a small amount of food.

Never change the dose on your own. Dogs with kidney disease, liver disease, seizure risk, or very small body size may need a more tailored plan. If you miss a dose, ask your vet or follow the label instructions. In general, do not double up unless your vet specifically tells you to.

Many dogs tolerate metoclopramide well, but side effects can happen. The most commonly reported ones include restlessness, hyperactivity, drowsiness, increased urination, constipation, vocalization, muscle spasms, or tremors. Some dogs seem agitated rather than sleepy.

Less common but more concerning reactions include aggression, marked behavior changes, severe sedation, twitching, or worsening vomiting. Because metoclopramide affects dopamine pathways, neurologic or behavioral effects are especially important to watch for.

Call your vet promptly if your dog seems unusually distressed, disoriented, shaky, or hard to settle after a dose. Stop the medication and seek urgent veterinary guidance if your dog has collapse, seizures, facial swelling, trouble breathing, or signs of severe abdominal pain.

Metoclopramide can interact with other medications, so your vet should review everything your dog takes, including supplements and compounded products. Important interactions may involve opioids, which can slow gut movement and reduce the prokinetic effect, and anticholinergic drugs such as atropine, which can also counteract its action on the digestive tract.

Caution is also needed with phenothiazine tranquilizers, some sedatives, and medications that may lower the seizure threshold. Dogs taking monoamine oxidase inhibitor-type drugs, including some flea or tick products or behavior medications, may need extra review because of possible blood pressure or neurologic concerns.

If your dog is already taking anti-nausea drugs, reflux medications, pain medications, or neurologic medications, ask your vet whether the combination still makes sense. The safest plan is to use one coordinated medication list from one veterinary team.

Usually yes, but many dogs are instructed to take it before meals for best effect.

Metoclopramide is not limited to specific breeds, but breed-related risk still matters. Dogs with the ABCB1 (MDR1) mutation may be more prone to adverse neurologic effects from some medications, and Merck notes this as a concern with metoclopramide. Deep-chested breeds such as Great Danes, Standard Poodles, Weimaraners, and German Shepherd Dogs also deserve extra caution if they are retching, restless, or bloated, because those signs can fit gastric dilatation-volvulus rather than routine nausea.

All breeds can be prescribed metoclopramide: Yes

Dogs with ABCB1 mutation may have higher neurologic sensitivity: Possible

Deep-chested breeds need urgent evaluation for bloat if retching or abdominal distension is present: Higher emergency risk