Cat Seizures: Causes, What to Do & Epilepsy Treatment

Last updated: May 17, 2026

Watching your cat have a seizure is one of the most alarming experiences a pet owner can face. The sudden loss of control, the involuntary movements, and the confusion that follows leave most people feeling helpless. But understanding what cat seizures are, what causes them, and exactly how to respond can make a critical difference in your cat’s outcome and your ability to stay calm under pressure.

Seizures in cats are less common than in dogs, but they are far from rare. They can affect cats of any age, breed, or background, and the causes range from treatable metabolic conditions to chronic neurological disorders. Whether your cat has just experienced their first seizure or has been living with epilepsy for years, this comprehensive guide covers everything you need to know — from recognizing the signs and understanding the types to emergency protocols, diagnosis, medication options, and long-term management.

What Seizures Look Like in Cats

A seizure occurs when abnormal, uncontrolled electrical activity disrupts normal brain function. In cats, the outward signs can vary dramatically — from barely noticeable behavioral changes to full-body convulsions that are impossible to miss.

The classic presentation of cat seizures involves a cat falling to their side, becoming rigid, and then exhibiting rhythmic paddling or jerking movements of the legs. Their eyes may become wide and fixed, their jaw may clamp or chatter, and they may drool heavily. Some cats vocalize — yowling or crying out — during the episode. Loss of bladder or bowel control is common. However, many feline seizures look nothing like this and can be so subtle that owners do not realize what they are witnessing.

Like seizures in other species, cat seizures typically follow a three-phase pattern:

• Pre-ictal phase (aura): In the minutes or hours before a seizure, your cat may become restless, hide, vocalize unusually, seem anxious, or seek you out in an uncharacteristic way. Some cats pace or appear disoriented. This phase is not always noticeable.
• Ictal phase: This is the seizure itself. It typically lasts between 30 seconds and two minutes. During this phase, the cat has no voluntary control over their body.
• Post-ictal phase: After the seizure ends, your cat may appear confused, disoriented, temporarily blind, wobbly, or exhausted. Some cats pace compulsively, some hide, and others are ravenously hungry or excessively thirsty. This recovery period can last from a few minutes to several hours, and occasionally up to a day or two.

Types of Cat Seizures: Focal, Generalized, and Cluster

Veterinary neurologists classify cat seizures into distinct types based on how much of the brain is involved and how the episode presents. Understanding the type helps both diagnosis and treatment.

Focal (Partial) Seizures

Focal seizures originate in one localized area of the brain and affect only one part or side of the body. In cats, focal seizures are actually more common than many owners realize. You might observe twitching of one side of the face, rapid blinking, one ear flicking repeatedly, one paw or leg jerking, or unusual repetitive behaviors such as compulsive lip licking, chewing motions, or sudden aggression. Some cats experience what are called “absence seizures,” where they simply stare blankly and become unresponsive for a few seconds. Focal seizures can sometimes progress into generalized seizures, a pattern known as secondary generalization.

Generalized Seizures

Generalized seizures affect both hemispheres of the brain simultaneously. The cat loses consciousness entirely and typically falls to their side. Tonic-clonic seizures (formerly called grand mal seizures) are the most dramatic and recognizable form — the cat’s body stiffens (the tonic phase) and then begins rhythmic jerking or convulsing (the clonic phase). Tonic seizures involve only the stiffening, while clonic seizures involve only the jerking. There are also atonic seizures, where the cat suddenly loses all muscle tone and collapses. Generalized seizures are what most people picture when they think of a seizure, and they are the type most likely to prompt an urgent veterinary visit.

Cluster Seizures

Cluster seizures are defined as two or more seizures occurring within a 24-hour period. They are significantly more dangerous than a single isolated seizure because the brain does not have adequate time to recover between episodes. Cluster seizures increase the risk of permanent brain damage, dangerously elevated body temperature, and progression to status epilepticus. Cats experiencing cluster seizures require immediate veterinary intervention — this is not a situation to take a wait-and-see approach.

Causes of Cat Seizures

Determining why a cat is having seizures is one of the most important steps in treatment. The underlying cause directly influences the treatment approach and the long-term prognosis. The following are the most common causes of cat seizures.

Idiopathic Epilepsy

Idiopathic epilepsy — seizures with no identifiable underlying cause — is the most common diagnosis in young to middle-aged cats with recurrent seizures. It is less prevalent in cats than in dogs, but it does occur. A diagnosis of idiopathic epilepsy is typically made after all other potential causes have been ruled out through diagnostic testing. While no specific breed predisposition has been conclusively established in cats the way it has in dogs, some research suggests that certain breeds may have a slightly higher incidence. If you are researching feline breeds, our cat breeds directory includes health information for many popular breeds.

Toxin Exposure

Cats are exceptionally sensitive to many substances that dogs and humans tolerate without issue. Permethrin — a common ingredient in dog flea and tick products — is one of the most frequent causes of toxin-induced seizures in cats and can be fatal. Essential oils, particularly tea tree oil, eucalyptus, and pennyroyal, are also highly toxic to cats. Lilies, antifreeze (ethylene glycol), certain human medications such as antidepressants and NSAIDs, rodenticides, and organophosphate insecticides can all trigger seizures. Toxin-induced seizures often come on suddenly in an otherwise healthy cat and may be accompanied by vomiting, drooling, difficulty breathing, or loss of coordination.

Brain Tumors

In older cats — particularly those over 10 years of age — who experience their first seizure, a brain tumor is one of the primary concerns. Meningiomas are the most common primary brain tumor in cats and are often benign and potentially operable, which is actually a more favorable situation than in many other species. Lymphoma can also affect the feline brain. Seizures caused by brain tumors may gradually increase in frequency or severity, and the cat may develop additional neurological signs such as circling, head pressing, behavior changes, unequal pupil size, or unsteady gait.

Liver Disease and Hepatic Encephalopathy

The liver is responsible for filtering toxins from the bloodstream. When liver function is compromised — due to hepatic lipidosis (fatty liver disease), portosystemic shunts, cholangiohepatitis, or chronic liver failure — toxins such as ammonia accumulate in the blood and reach the brain, causing a condition called hepatic encephalopathy. This can manifest as seizures, disorientation, excessive drooling, head pressing, or behavioral changes. Hepatic lipidosis is one of the most common liver disorders in cats, often triggered by a period of not eating, and is treatable when caught early.

Metabolic Causes

Several metabolic disturbances can trigger seizures in cats. Hypoglycemia (low blood sugar), particularly in kittens, diabetic cats receiving insulin, or cats with insulinomas, is a well-documented cause. Hypocalcemia (low calcium), which can occur in nursing queens or cats with parathyroid disorders, can also cause seizures. Kidney disease, severe electrolyte imbalances, hyperthyroidism, and thiamine (vitamin B1) deficiency — sometimes seen in cats fed exclusively raw fish diets — round out the metabolic causes that veterinarians consider.

Infectious and Inflammatory Causes

Feline infectious peritonitis (FIP), toxoplasmosis, cryptococcosis, and other fungal or parasitic infections can cause inflammation in the brain (encephalitis) that leads to seizures. Immune-mediated encephalitis, where the cat’s own immune system attacks brain tissue, is another possibility. These causes are identified through advanced diagnostics including cerebrospinal fluid analysis and sometimes brain biopsy.

What to Do During a Cat Seizure

Knowing what to do when your cat has a seizure can prevent injury and ensure your cat gets appropriate care. Here is the correct approach:

• Stay calm. Your cat is not conscious or in pain during the seizure. Panicking will impair your ability to respond effectively and may increase stress during the recovery phase.
• Protect them from injury. Gently move nearby objects that your cat could strike during the seizure. If they are on a table, countertop, cat tree, or elevated surface, carefully place a cushion or blanket below them in case they fall — but do not try to move a seizing cat unless they are in immediate danger.
• Time the seizure. Check the clock or start a timer on your phone as soon as the seizure begins. The duration is one of the most important pieces of information your veterinarian will ask for. A seizure lasting longer than five minutes is a medical emergency.
• Record video if possible. If someone else is present, have them record the episode on their phone. Video allows your veterinarian to see the exact nature and progression of the seizure, which is invaluable for diagnosis and determining the seizure type.
• Dim the lights and reduce noise. Both during and after the seizure, a calm, quiet, dimly lit environment helps reduce stimulation that could prolong the episode or worsen the post-ictal phase.
• Note what happened before. Once the seizure has passed, write down any unusual behavior that preceded it, what your cat was doing, whether they had access to any new substances, and the exact time and duration. Keep this information for your veterinarian.

What NOT to Do During a Cat Seizure

Several well-intentioned responses can make the situation worse or put you at risk of serious injury.

Do not put your hands or any object in your cat’s mouth. Cats cannot swallow their tongue during a seizure. This is a persistent myth. A seizing cat’s jaw can clamp down with significant involuntary force, and cat bites carry a high risk of infection. Keep your hands away from their mouth entirely.

Do not restrain your cat. Holding a seizing cat down will not stop the seizure and may cause injury to the cat or to you. Cats are already disoriented and frightened during the post-ictal phase — being physically restrained will only increase their distress and may trigger a defensive bite or scratch.

Do not shout or try to wake them up. Loud noises and physical stimulation can intensify the seizure or make the post-ictal confusion worse. Speak in a soft, calm voice and keep the environment as quiet as possible.

Do not offer food or water until they are fully alert. A cat that is still disoriented, wobbly, or not fully conscious could choke. Wait until your cat is walking normally and seems oriented before offering water. Food can wait longer.

When Cat Seizures Are an Emergency: Status Epilepticus

While any seizure warrants a veterinary visit, certain situations are life-threatening emergencies that require immediate action.

Status epilepticus is the most dangerous seizure emergency. It occurs when a seizure continues for more than five minutes without stopping, or when a cat has repeated seizures without regaining consciousness between episodes. During prolonged seizure activity, body temperature rises to dangerous levels, brain cells sustain damage from sustained abnormal electrical firing, and organ function can be compromised. Without emergency intervention — typically intravenous diazepam or midazolam, along with supportive care — status epilepticus can be fatal.

How Cat Seizures Are Diagnosed

When you bring your cat to the veterinarian after a seizure, the diagnostic process follows a systematic approach to identify the underlying cause.

The workup typically begins with a thorough physical and neurological examination, followed by comprehensive blood work including a complete blood count, serum chemistry panel, and thyroid level. Urinalysis is also standard. These initial tests screen for metabolic causes such as liver dysfunction, kidney disease, hypoglycemia, electrolyte imbalances, and hyperthyroidism — all of which are relatively common and treatable causes of feline seizures.

If blood work and urinalysis are unremarkable and your cat fits the typical profile for idiopathic epilepsy — generally between one and seven years old, neurologically normal between seizures, and otherwise healthy — your veterinarian may make a presumptive diagnosis and begin discussing treatment.

If the presentation is atypical, if the cat is older, or if neurological abnormalities are detected between seizures, advanced diagnostics are likely recommended. An MRI is the gold standard for identifying structural brain abnormalities such as tumors, inflammation, or malformations. A cerebrospinal fluid (CSF) tap may be performed to test for infectious or inflammatory conditions. In some cases, testing for specific infections such as FIP, toxoplasmosis, or cryptococcosis may also be warranted.

Treatment: Phenobarbital, Levetiracetam, Gabapentin, and More

Treatment for cat seizures depends entirely on the underlying cause. Toxin exposure requires decontamination and supportive care. Liver disease requires addressing the hepatic condition. Brain tumors may be treated with surgery, radiation, or palliative care depending on type and location. For idiopathic epilepsy and cases where seizures persist despite treating the underlying cause, anticonvulsant medication becomes the cornerstone of management.

Most veterinarians recommend starting anticonvulsant therapy if a cat is having more than one seizure every four to six weeks, if seizures are becoming more frequent or severe, if the cat has experienced cluster seizures or status epilepticus, or if the post-ictal phase is prolonged and significantly affects quality of life.

The most commonly used anticonvulsant medications in cats include:

• Phenobarbital — the most widely used first-line anticonvulsant for cats. It is effective, relatively affordable, and available in tablet and liquid forms. It requires regular blood monitoring to check drug levels and liver function. Most cats tolerate it well, though dosing adjustments are common in the early months.
• Levetiracetam (Keppra) — increasingly popular as either a first-line or add-on medication. Its key advantage is that it is not metabolized by the liver, making it a preferred choice for cats with liver concerns. It has a relatively mild side effect profile. The standard form requires dosing three times daily, though an extended-release formulation is available.
• Gabapentin — while primarily known as a pain management and anti-anxiety medication in feline medicine, gabapentin can serve as an adjunct anticonvulsant in some cases. It is not typically used as a sole seizure medication but may be added to a regimen when first-line drugs alone are insufficient.
• Zonisamide — a newer anticonvulsant that may be used alone or in combination with other medications. It requires less frequent dosing than some alternatives, which can be a meaningful advantage for cats that are difficult to medicate.
• Diazepam (Valium) — used primarily for emergency seizure control rather than long-term management in cats. Oral diazepam has been associated with rare but severe hepatic necrosis in cats, so it is generally reserved for acute situations administered intravenously or rectally.

A critical rule of anticonvulsant therapy: never stop seizure medication abruptly. Sudden withdrawal can trigger severe rebound seizures that are worse than the original episodes. Any changes to medication type or dosage must be made gradually under direct veterinary supervision.

Side Effects of Seizure Medication in Cats

All anticonvulsant medications carry potential side effects, and knowing what to expect helps you monitor your cat and communicate effectively with your veterinarian.

Phenobarbital commonly causes sedation, increased appetite, increased thirst and urination, and mild incoordination when first started or when the dose is increased. These effects often diminish as the cat adjusts over the first few weeks. Long-term use requires monitoring for liver damage and, rarely, blood cell abnormalities.

Levetiracetam tends to have fewer side effects than phenobarbital. Mild sedation and decreased appetite are the most frequently reported issues, and they are generally transient. Some cats experience mild gastrointestinal upset.

Gabapentin commonly causes sedation, which is actually the reason it is frequently prescribed for anxiety. In most cats, this sedative effect diminishes over several days as they acclimate to the medication.

Report any new or worsening symptoms to your veterinarian promptly. Side effects that are severe, persistent, or progressive may indicate a need to adjust the dose or switch medications.

Living with an Epileptic Cat

A diagnosis of epilepsy does not mean your cat cannot live a full and comfortable life. With consistent management, most epileptic cats do very well. Here is what long-term care involves.

Consistent medication schedule. Administer anticonvulsant medication at the same times every day. Even a few hours of variation can cause drug levels to dip low enough to trigger a seizure. Set phone alarms, use pill organizers, and always keep a backup supply on hand. Plan ahead for vacations, holidays, and any situation that might disrupt your routine.

Regular veterinary monitoring. Cats on anticonvulsant medication need blood work every six months at minimum — more frequently when a medication is first started or after dose changes. These tests check that drug levels are within the therapeutic range and that organ function remains healthy. Skipping these appointments puts your cat at risk.

Environmental management. While seizure triggers in cats are not as well documented as in dogs, stress, major changes in routine, overstimulation, and sleep disruption have been anecdotally associated with increased seizure activity. Maintaining a calm, predictable environment with consistent feeding times, quiet resting spaces, and minimal disruptions supports overall neurological stability.

Indoor safety. Epileptic cats should be kept indoors. A seizure that occurs outside, near a road, in a tree, or near water could be fatal. Inside the home, consider whether your cat frequently perches on high shelves or cat trees — a seizure at height could result in a serious fall.

Emergency preparedness. Know the location and hours of your nearest emergency veterinary clinic. Keep their phone number saved and easily accessible. If your veterinarian has prescribed an at-home emergency medication such as rectal diazepam or intranasal midazolam, ensure every member of your household knows where it is and how to use it.

Quality of life. Epileptic cats can still enjoy play, affection, companionship, and a rich indoor environment. The condition requires consistent management, not a diminished life. Many cats with well-controlled epilepsy go months or longer between seizures. If you are considering adopting a cat with a known seizure history, know that these cats can be wonderful, loving companions with the right care and commitment.

Monitoring with a Seizure Log

One of the most valuable tools in managing feline epilepsy is a detailed seizure log. This record helps your veterinarian assess whether the current treatment plan is working, identify patterns, and make informed adjustments.

Your seizure log should include the following for each episode:

• Date and time the seizure occurred
• Duration of the seizure (as precisely as possible)
• Type — focal, generalized, or unknown
• Description of what you observed — which body parts were affected, whether consciousness was lost, any vocalizations, loss of bladder or bowel control
• Pre-ictal signs — any unusual behavior before the seizure
• Post-ictal behavior — how long recovery took, what your cat was like afterward
• Potential triggers — anything unusual that day such as a change in routine, new food, visitors, loud noises, or a missed medication dose
• Medication status — confirm that medication was given on schedule

Bring this log to every veterinary appointment. Patterns that are invisible in the moment — such as seizures clustering around a certain time of day, worsening gradually, or correlating with specific events — become clear when you have weeks or months of data to review.

Frequently Asked Questions

Can cat seizures cause brain damage?

A single brief seizure lasting under two minutes is unlikely to cause permanent brain damage. However, prolonged seizures (status epilepticus lasting more than five minutes) and frequent cluster seizures can cause lasting neurological injury due to sustained abnormal electrical activity, oxygen deprivation, and dangerous increases in body temperature. This is why any seizure lasting more than five minutes requires immediate emergency care.

Are certain cat breeds more prone to seizures?

Unlike dogs, where breed predisposition to epilepsy is well established, the evidence in cats is less definitive. Some studies have suggested a possible increased incidence in certain breeds, but no breed has been conclusively identified as having a strong genetic predisposition. Seizures can affect any cat regardless of breed, age, or background. You can explore breed-specific health information in our cat breeds directory.

Can indoor cats still have seizures from toxin exposure?

Absolutely. Many of the most dangerous toxins are found inside the home. Permethrin from dog flea products, essential oils used in diffusers, certain houseplants like lilies, human medications left on counters, and cleaning chemicals can all cause seizures in cats. Being indoors does not eliminate toxin risk — it simply changes which toxins your cat is most likely to encounter.

How long can a cat live with epilepsy?

Cats with well-managed idiopathic epilepsy can live a normal or near-normal lifespan. The epilepsy itself is not typically life-shortening when seizures are controlled with medication and the cat receives regular veterinary monitoring. Prognosis depends more on the underlying cause — cats with idiopathic epilepsy generally have a better long-term outlook than those whose seizures are caused by a progressive condition such as a brain tumor.

Should I take my cat to the vet after one seizure?

Yes. A first seizure always warrants a veterinary visit, even if it was brief and your cat appears to have recovered completely. Your veterinarian will perform a physical examination and recommend blood work to screen for treatable underlying causes. Early evaluation establishes a baseline and ensures that any condition requiring treatment is identified promptly rather than after additional seizures occur.

Can I give my cat CBD oil for seizures?

While there is growing interest in cannabidiol (CBD) for seizure management in animals, the evidence in cats is extremely limited. There are currently no FDA-approved CBD products for feline seizure control, dosing guidelines are not well established, and product quality varies widely. Some CBD products contain THC or other compounds that can be harmful to cats. Do not use any CBD product without first consulting your veterinarian, and never use it as a replacement for prescribed anticonvulsant medication.