Levetiracetam (Keppra) for Epilepsy in Dogs

Brain & CognitionQ&AMeongsiljang Veterinary Advisory Board

Levetiracetam (Keppra) is an anticonvulsant used to control epileptic seizures in dogs. Here’s a simple overview of its side effects and dosing instructions.

What is Levetiracetam (Keppra)?

A golden retriever resting comfortably at home, with a bottle of medicine nearby.

Levetiracetam (brand name Keppra) is an anticonvulsant used to control epileptic seizures in dogs. Because it is well tolerated and relatively safe in dogs, it is frequently prescribed as either a primary or adjunctive medication, often in combination with phenobarbital. Since it undergoes minimal metabolism in the liver, it places less burden on hepatic function, which can provide peace of mind for pet owners. However, because the drug is primarily excreted through the kidneys, dosage adjustments may be necessary for dogs with compromised renal function. It is typically administered two to three times daily. Never discontinue the medication on your own; strictly adhering to the prescribed dosage and schedule is essential to prevent seizure recurrence.

How Does It Prevent Seizures?

Levetiracetam binds to the synaptic vesicle protein SV2A on the surface of brain neurons, preventing the excessive release of excitatory neurotransmitters. In simple terms, you can think of it as gently flipping off the switch that causes the brain to become overexcited. According to veterinary pharmacology textbooks, it works through multiple pathways, including the inhibition of voltage-dependent calcium channels, which is why it often proves effective even in cases of epilepsy that do not respond well to other medications.

Phenobarbital vs. Levetiracetam: A Comparison

Item	Phenobarbital	Levetiracetam (Keppra)
Dosing interval	Every 12 hours	Every 8 hours (immediate-release)
Liver burden	Present (regular blood tests required)	Minimal
Blood level testing	Required	Usually not required
Sedative side effects	Strong initially	Mild
Price range	Inexpensive	Moderate to high

※ Actual prescribing varies with seizure pattern and individual health status.

Administration Methods and Feeding Tips

Immediate-release tablets (standard tablets) are typically administered three times a day, spaced eight hours apart. If extended-release (XR/ER) tablets are prescribed, the frequency may be reduced to twice daily. Since your veterinarian determines the dosage based on your pet’s weight, never adjust the dose on your own. Here are some tips for administration: - Set a consistent schedule: Use an alarm to administer the medication at the same time every day. - With or without food: Since it causes minimal gastrointestinal irritation, you can give it at whatever time is most convenient. - If you miss a dose: Administer it immediately if more than four hours remain until the next dose; otherwise, skip the missed dose. - Never stop abruptly: Suddenly discontinuing the medication significantly increases the risk of seizure recurrence.

A pet owner’s hand giving medicine to a puppy

When to Contact Your Veterinarian Immediately

Levetiracetam is relatively safe, but you should contact your veterinarian immediately if you notice any of the following signs: - Seizures lasting more than five minutes or occurring more than twice a day despite medication - Severe inability to stand, staggering, or lethargy persisting for several hours - Severe vomiting or diarrhea that makes it difficult to maintain medication - Complete loss of appetite or jaundice (yellowing of the gums) If a seizure lasts longer than five minutes, it can be a dangerous emergency in itself, so going directly to an emergency clinic is the standard protocol.

Key Side Effects and Management

Side effects of levetiracetam are mostly mild and temporary. Here are the key side effects for pet owners to be aware of: - Sedation/drowsiness: Common in the first 1–2 weeks of treatment, gradually improving as the pet adjusts - Ataxia: Stumbling or unsteady gait, usually resolving within a few days - Decreased appetite: Mild; appetite typically remains stable, but veterinary consultation is needed if it persists - Behavioral changes: Rarely, anxiety or restlessness; severe cases may require dosage adjustment If symptoms last longer than two weeks or significantly interfere with daily life, dosage adjustment should be considered. Never discontinue the medication without veterinary guidance.

Concurrent Use and Management Considerations

Levetiracetam is often used in combination with other anticonvulsants, particularly as an add-on medication when phenobarbital alone does not provide adequate seizure control. Here are key points to keep in mind when using it concurrently: - Blood tests: If used with phenobarbital, regular monitoring of liver enzyme levels is essential. - Vaccinations and deworming: These can proceed on the usual schedule during stable periods. - Surgery and anesthesia: Always inform your veterinarian that your pet is taking this medication. - Diet: There are no specific dietary restrictions, but maintaining a healthy weight is important. Consistently keeping a seizure diary (including date, time, and duration of each episode) greatly assists in making informed decisions about dosage adjustments.

Dogs That Require Extra Caution

Dogs with impaired kidney function may have altered processing of levetiracetam in their bodies, so dose adjustments may be necessary. For senior dogs or those with chronic kidney disease, regular kidney function tests should be performed alongside treatment. Additionally, because safety data are limited for pregnant or nursing dogs, it is essential to consult your veterinarian to carefully weigh the risks and benefits. If your dog needs to take other medications (such as antibiotics or pain relievers), always inform your veterinarian that they are currently taking an anticonvulsant.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Will levetiracetam completely eliminate seizures?

This medication doesn’t aim for a complete cure, but rather helps **control** seizures by reducing their frequency and severity. While many dogs experience a significant decrease in seizure episodes, lifelong treatment is often necessary.

Can I stop the medication suddenly?

Absolutely not. Abruptly stopping the medication can actually trigger **rebound seizures**. If a dose reduction is necessary, it must be done gradually under your veterinarian’s guidance.

I forgot to give my pet their medication and missed a dose. Can I give them two doses at once?

No, you should not give two doses at once, as this increases the risk of side effects. If more than 4 hours remain until the next scheduled dose, administer a single dose immediately. If less than 4 hours remain, wait and give the regular single dose at the next scheduled time.

Can I share my medication with my pet if it contains the same ingredients as human drugs?

No, you shouldn’t. Human-formulation Keflex may differ in dosage strength and inactive ingredients. Always administer only the formulation and dosage prescribed by a veterinarian.

How often should regular blood tests be performed?

Levetiracetam does not yet have established target blood concentrations in veterinary medicine, so when used as a standalone treatment, your veterinarian will determine the appropriate schedule for regular blood tests based on your pet’s individual health status. If levetiracetam is used in combination with phenobarbital, it is important to have regular blood tests, including liver function assessments, performed at intervals directed by your veterinarian.

Effects of Vitamin B12 (Cobalamin) and Deficiency Symptoms

Comprehensive Guide to Coprophagia Management in Dogs: Top Recommendations and Selection Criteria

Top 5 Recommended Cognitive Supplements for Cats in 2026

How to Trim Your Cat’s Nails and Recommended Frequency

Guide to Introducing Cats in Multi-Cat Households

Reasons for Litter Box Avoidance in Cats and Correction Methods

Causes of Cat Spraying and Correction Methods

Feline Diabetes: Symptoms and Management

List of Foods Pets Should Never Eat

Causes and Treatment of Hot Spots (Acute Moist Dermatitis) in Dogs

References

[1] Small Animal Critical Care Medicine, 3rd Ed - Levetiracetam chapter

[2] Bateman SW, Parent JM, Clinical findings, treatment, and outcome of dogs with status epilepticus or cluster seizures: 156 cases (1990-1995), J Am Vet Med Assoc 215(10):1463-1468, 1999

[3] Podell M, Epilepsy in Small Animal Practice

[4] Handbook of Veterinary Pharmacology - Anticonvulsants