Keppra for Dogs: Dosage and Missed Doses

Name: Keppra for Dogs: Dosage and Missed Doses
Creator: Dr. Zubair Khalid

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-10-03

Levetiracetam, sold under the brand name Keppra and also as generic levetiracetam, is an antiseizure medication that veterinarians prescribe for dogs with epilepsy and other seizure disorders. The dose is always calculated for your individual dog by your veterinarian, and a keppra for dogs dosage chart by weight is a starting reference, not a prescription. Missed doses matter more with this drug than with many others because it leaves the body quickly.

This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

Keppra (levetiracetam) is dosed by body weight, and your veterinarian sets the exact amount and schedule for your dog.
Levetiracetam has a short half-life, roughly 2.8 to 3.6 hours in healthy dogs after intranasal dosing, so gaps between doses can let drug levels drop [1][2].
If you miss a dose, give it as soon as you remember unless it is almost time for the next one. Never double up without asking your vet.
Never change the dose or stop the drug on your own. Stopping suddenly can trigger more seizures.
Call your veterinarian or an animal poison control hotline right away if your dog gets too much or has trouble standing, walking, or staying awake.

What Keppra Is and What Veterinarians Use It For

Levetiracetam is an antiepileptic drug with a mechanism of action that is distinct from other seizure medications [3]. In dogs, it is used most often as an add-on medication for dogs already taking another antiseizure drug, though some veterinarians use it on its own. It is also used in dogs with liver shunts (portosystemic shunts), low blood sugar affecting the brain, and traumatic brain injury [3].

One reason veterinarians like it is its pharmacokinetic profile. Levetiracetam has linear kinetics, excellent oral bioavailability, and minimal drug interactions with other medications [3]. That makes it easier to combine with drugs like phenobarbital without constant dose adjustments.

Levetiracetam is eliminated mainly through the kidneys, not the liver [4]. That matters for two reasons. First, it tends to be a reasonable choice for dogs with liver disease. Second, dogs with kidney problems may need a different dose or a different drug, and your veterinarian will weigh that when prescribing.

How Levetiracetam Works in Dogs

Levetiracetam works differently from older seizure drugs. Instead of acting on the same channels that phenobarbital or potassium bromide target, it binds to a specific protein in the brain that helps regulate how nerve cells release signaling chemicals. This is why it can be added to another antiseizure medication without the two drugs fighting each other [3].

The practical result is a drug that is generally well tolerated and rarely causes serious side effects in dogs or cats [3]. It does not need routine blood level monitoring the way phenobarbital often does, though your veterinarian may still check bloodwork for other reasons.

Keppra for Dogs Dosage Chart by Weight: What Owners Should Know

There is no single universal keppra for dogs dosage chart that applies to every dog. The dose depends on your dog's weight, kidney function, other medications, and how well seizures are controlled.

Who Decides the Dose

Your veterinarian decides the dose. They calculate it from your dog's body weight and health status, then adjust it over time based on seizure control and side effects. Do not use a chart you find online to dose your dog yourself. A chart can help you understand what your veterinarian is doing, but it cannot replace an exam, bloodwork, and a prescription.

How the Drug Is Given

Levetiracetam comes as tablets, as an oral liquid, and as an injectable form used in hospitals. Most dogs at home take it by mouth, usually two or three times a day. Some dogs get it three times daily because the drug clears quickly.

Research in healthy dogs shows how fast levetiracetam moves through the body. After a single intranasal dose of 30 mg/kg, the elimination half-life was about 3.6 hours, and peak blood levels were reached in about 2.3 hours [1]. A separate study using the intravenous formulation given intranasally found a median half-life of about 2.83 hours [2]. Those numbers explain why timing matters so much with this medication.

What to Do About a Missed Dose

A missed dose of levetiracetam is not a small thing. Because the drug leaves the body within hours, a gap can allow brain levels to fall and seizures to break through.

Here is a simple approach:

Give the missed dose as soon as you remember, as long as it is not close to the time for the next scheduled dose.
If the next dose is due soon, skip the missed one and give the next dose on schedule.
Never give two doses at once to catch up unless your veterinarian tells you to.
Write down the missed dose and tell your veterinarian at your next contact, especially if seizures happened.

If you are unsure what counts as "close," call your veterinary clinic. They can look at your dog's specific schedule and tell you exactly what to do. For a general framework that applies to most pet medications, see What to Do If You Miss a Dose of Your Dog's Medication.

Keeping the Schedule Steady

Set phone alarms for each dose. Use a pill organizer labeled by day and time. If more than one person in the house gives medication, write the schedule on the refrigerator so no one doubles up or skips. Consistency is the single most useful thing you can do at home.

Side Effects of Keppra in Dogs

Most dogs tolerate levetiracetam well. Serious side effects are rarely reported in dogs or cats [3]. Still, some dogs have reactions, and you should know what to watch for.

Side effect	How common or serious	What to do
Sleepiness or mild sedation	Common, usually mild	Note the time of day it happens. Call your vet if it does not improve or affects daily activity.
Unsteady walking or wobbliness	Uncommon, can be serious	Call your veterinarian the same day. Do not give the next dose until you talk to them.
Vomiting or stomach upset	Uncommon, usually mild	Offer water. Call your vet if it repeats or your dog stops eating.
Agitation or unusual behavior	Uncommon	Keep your dog safe at home and call your vet.
Severe weakness, collapse, or trouble breathing	Rare, emergency	Go to a veterinary emergency hospital now.
Changes in kidney values over time	Possible with long-term use, monitored by bloodwork	Keep routine recheck appointments.

Because levetiracetam is cleared by the kidneys, veterinarians sometimes monitor renal values in dogs taking it long term, particularly when another antiseizure drug is also on board. A four-week study of dogs with idiopathic epilepsy taking phenobarbital plus levetiracetam found no statistically significant changes in SDMA, serum creatinine, BUN, phosphorus, or albumin over the study period [4]. That is reassuring for short-term use, but it does not replace regular monitoring over months and years.

Who Should Not Take Keppra and What Interacts With It

Levetiracetam is not right for every dog. Your veterinarian will consider the following before prescribing.

Dogs With Kidney Problems

Since the drug is eliminated mainly through the kidneys [4], dogs with reduced kidney function may clear it more slowly. Your veterinarian may lower the dose, stretch the interval, or choose a different medication.

Dogs With Known Sensitivity

Any dog with a previous allergic or adverse reaction to levetiracetam should not take it again. Tell your veterinarian about every reaction you have seen, even mild ones.

Pregnant or Breeding Dogs

If your dog is pregnant, nursing, or part of a breeding program, tell your veterinarian. They will weigh the risks and benefits for that specific situation.

Drug Interactions

One of the advantages of levetiracetam is minimal drug interactions [3]. It is often used alongside phenobarbital without dose changes to either drug. Even so, always give your veterinarian a complete list of everything your dog takes, including other seizure medications, heart medications, pain medications, supplements, and over-the-counter products. If your dog takes other medications with narrow dosing windows, such as Pimobendan Vetmedin Cardiac Dose: Weight-Based CHF Dog Dosing Chart, your veterinarian needs the full picture before adjusting anything.

Overdose: When to Call a Veterinarian or Poison Control

Too much levetiracetam can cause heavy sedation, wobbliness, vomiting, and in severe cases difficulty breathing or collapse. If you think your dog got an extra dose or chewed into a pill bottle, act right away.

Call your veterinarian first if they are open. If they are closed, call an animal poison control hotline or go to the nearest veterinary emergency hospital. Bring the pill bottle with you so the team knows exactly what and how much was taken.

Do not wait to see if symptoms appear. With a drug that peaks in the blood within a couple of hours [1], early treatment is easier than late treatment.

Limitations and When to Contact a Veterinarian

This article gives general information. Your dog's case needs a veterinarian who knows your dog's history, weight, kidney values, and seizure pattern.

Contact your veterinarian the same day if:

Your dog missed a dose and had a seizure afterward
Your dog seems unusually sleepy, wobbly, or off balance
Your dog vomited a dose or you are not sure the medication stayed down
You see a change in appetite, drinking, or urination

Go to an emergency hospital now if:

A seizure lasts longer than a few minutes or comes in clusters
Your dog does not wake up fully between seizures
Your dog collapses, has trouble breathing, or cannot stand
You know or suspect a large overdose

Schedule a routine visit if:

Seizures are becoming more frequent or severe on the current dose
You are struggling to keep up with a three-times-daily schedule
You want to discuss whether the dose or timing should change

Never stop levetiracetam suddenly on your own. Stopping an antiseizure medication abruptly can trigger withdrawal seizures, which can be dangerous.

Frequently Asked Questions

Can I give my dog Keppra with food?

Yes, levetiracetam can generally be given with or without food. If your dog gets an upset stomach on an empty stomach, giving the dose with a small meal often helps. Ask your veterinarian if you are unsure about your dog's specific situation.

What happens if I give two doses too close together?

Giving doses too close together can raise blood levels higher than intended and increase the chance of sedation or wobbliness. Call your veterinarian or a poison control hotline for guidance. Do not simply skip the next dose unless a professional tells you to.

How long does Keppra stay in a dog's system?

It clears fairly quickly. In healthy dogs, the elimination half-life after intranasal dosing was measured at roughly 2.8 to 3.6 hours [1][2]. That short window is exactly why the dosing schedule matters and why a missed dose can matter too.

Can I stop Keppra if my dog has not had a seizure in months?

Do not stop it on your own. Seizure freedom on medication does not mean the seizures are gone, it means the drug is working. Your veterinarian can discuss whether a slow change is appropriate, and that decision should be made with their guidance.

Is generic levetiracetam the same as brand-name Keppra?

Generic levetiracetam contains the same active drug as the brand version. Your veterinarian may specify one or the other based on availability, cost, and your dog's response. If you switch products, tell your veterinarian so they can note it in your dog's record.

If your dog takes other medications, keep a written list and bring it to every visit. For dogs on multiple drugs, tools like the Gabapentin Dosage Calculator for Cats & Dogs: Veterinary Dosage Guide can help you understand how weight-based dosing works in general, but your veterinarian still sets every dose for your individual dog.

References

Single-Dose Pharmacokinetics of Intranasal Levetiracetam in Healthy Dogs. Journal of veterinary pharmacology and therapeutics, 2026.
Pharmacokinetics of intranasal levetiracetam in healthy dogs: a feasible route of administration. American journal of veterinary research, 2026.
A review of the pharmacology and clinical applications of levetiracetam in dogs and cats. Journal of veterinary emergency and critical care (San Antonio, Tex. : 2001), 2024.
Short-Term Renal Effects of Add-On Levetiracetam in Client-Owned Dogs with Idiopathic Epilepsy Receiving Phenobarbital: A Four-Week Prospective Study. Veterinary sciences, 2026.