Levetiracetam (Keppra) for Dogs: Uses, Dosage & Side Effects

See your vet immediately if your dog is having a seizure that lasts more than 5 minutes, has repeated seizures close together, has trouble breathing, or does not recover normally between episodes.

This article is educational only and is not a substitute for veterinary care. Levetiracetam is a prescription anticonvulsant used off-label in dogs, and the right dose depends on your dog’s weight, seizure pattern, kidney function, and any other medications they take.

Do not start, stop, skip, or change this medication without guidance from your vet. Sudden changes can increase the risk of breakthrough seizures, especially in dogs that need very consistent dosing.

Levetiracetam is an anticonvulsant medication used to help control seizures in dogs. It is commonly known by the human brand name Keppra, but veterinarians often prescribe the generic form. In veterinary medicine, it is usually used extra-label, which means it is a human medication prescribed legally by your vet for an animal patient.

This medication works in the brain to reduce abnormal electrical activity linked to seizures. Compared with some older seizure drugs, levetiracetam is often considered easier to use because it tends to have fewer drug interactions and is largely cleared by the kidneys rather than heavily processed by the liver.

It comes in several forms, including immediate-release tablets, extended-release tablets, and oral liquid. The best form depends on your dog’s size, how often doses can realistically be given, and whether your dog needs a compounded version for easier administration.

Levetiracetam is most often used to manage epilepsy and recurrent seizures in dogs. Your vet may prescribe it as the main seizure medication, but it is also commonly added when another anticonvulsant alone is not giving enough control.

It is frequently paired with medications such as phenobarbital or potassium bromide in dogs with difficult-to-control epilepsy. Some neurologists also use it in dogs with cluster seizures, or in dogs where liver disease makes other medication choices less straightforward.

The goal is not always complete seizure elimination. For many dogs, the realistic goal is fewer seizures, shorter seizures, faster recovery, and better day-to-day quality of life. Your vet will help decide whether levetiracetam fits your dog’s seizure type and overall health picture.

Levetiracetam dosing in dogs varies by formulation and by the rest of the treatment plan. A commonly cited immediate-release dose range is 20 to 60 mg/kg by mouth every 8 hours, with many dogs starting around 20 mg/kg every 8 hours. Extended-release tablets are often used at about 30 mg/kg every 12 hours in appropriate patients.

Because levetiracetam has a relatively short half-life in dogs, timing matters. Missing doses or giving them late can increase the chance of breakthrough seizures. If your dog is also taking phenobarbital, your vet may adjust the levetiracetam plan because the combination can change how quickly the drug is cleared.

Extended-release tablets should not be crushed, split, or chewed unless your vet specifically says otherwise. Dogs with kidney disease may need dose adjustments, and very small dogs may need a liquid or compounded form so the dose can be measured more accurately.

If you miss a dose, contact your vet for instructions. In many cases, the advice depends on how long ago the dose was due and how stable your dog’s seizure control has been.

Levetiracetam is generally well tolerated, but side effects can happen, especially when treatment first starts or when the dose changes. The most common issues are sleepiness, wobbliness, and reduced coordination. Some dogs also have vomiting, diarrhea, or decreased appetite.

A few dogs show behavioral changes such as restlessness, agitation, or unusual irritability. These effects are not the most common, but they are worth mentioning to your vet if they appear after starting the medication.

Call your vet promptly if side effects are severe, if your dog seems overly sedated, stops eating, cannot walk normally, or has more seizures after a medication change. Seek urgent care right away for prolonged seizures, repeated seizures without full recovery, collapse, or suspected overdose.

Levetiracetam is often chosen in part because it has fewer interactions than some older anticonvulsants. Even so, medication combinations still matter. Dogs taking phenobarbital may clear levetiracetam faster, which can affect how well it controls seizures and may lead your vet to adjust the dose or schedule.

It is also commonly used alongside potassium bromide and other seizure medications, but every added drug changes the full treatment picture. Sedation can be more noticeable when multiple neurologic medications are used together.

Tell your vet about all prescription drugs, supplements, compounded medications, and over-the-counter products your dog receives. That includes CBD products, calming chews, and any human medications in the home, since accidental mix-ups can be dangerous.

Levetiracetam is not a food or supplement. Give it exactly as your vet prescribes. It can often be given with food if stomach upset occurs, but extended-release tablets should not be crushed into food unless your vet specifically instructs you to do so.

Breed can influence seizure risk, but it does not automatically determine the best medication. A mixed-breed dog can need levetiracetam, and a predisposed purebred dog may need a different plan. Your vet will look at age of onset, seizure type, exam findings, and test results before recommending treatment options.

Breed risk: Idiopathic epilepsy is reported more often in some purebred dogs than in the general dog population.

Examples of predisposed breeds: Border Collies, Australian Shepherds, Labrador Retrievers, Beagles, Belgian Tervurens, and German Shepherd Dogs are among breeds commonly discussed in epilepsy literature.

Medication relevance: Levetiracetam is chosen based on seizure pattern and health status, not breed alone.