Cat Seizures: Causes, What to Do & When It's an Emergency

Seizures in cats are less common than in dogs, and they are often a sign that something else is going on rather than a stand-alone disease. Causes can be grouped into reactive seizures from problems outside the brain, structural seizures from disease inside the brain, and idiopathic epilepsy when testing does not find a clear reason. Your vet will use your cat's age, history, exam findings, and test results to sort through those possibilities.

Reactive causes include toxin exposure and body chemistry problems. Examples include low blood sugar, electrolyte disturbances, liver disease, kidney disease, and other metabolic illness. Toxins are especially important because some poisonings can cause sudden seizures and need immediate treatment. If your cat could have gotten into human medication, rodenticide, recreational drugs, essential oils, insecticides, or another suspicious substance, tell your vet right away.

Structural brain causes include head trauma, inflammation, infection, congenital brain disease, and tumors. In cats, infectious and inflammatory diseases can include conditions such as feline infectious peritonitis, toxoplasmosis, or fungal disease in some regions. Brain tumors, including meningioma, are also an important cause in middle-aged and senior cats.

Some cats have focal seizures, which may look subtle, such as facial twitching, ear flicking, staring, sudden chewing motions, or odd repetitive behavior. Others have generalized seizures with collapse, stiffening, paddling, drooling, and loss of bladder or bowel control. Even if the episode is brief, a first-time seizure deserves a prompt conversation with your vet.

See your vet immediately if your cat is actively seizing, has a seizure that lasts more than 2-5 minutes, has more than one seizure in 24 hours, stays disoriented longer than expected, has trouble breathing, or may have been exposed to a toxin. Prolonged seizures and cluster seizures can lead to dangerously high body temperature, brain injury, and other life-threatening complications.

A first-time seizure also deserves urgent veterinary attention, even if your cat seems better afterward. Cats often seize because of an underlying illness, and the cause may not be obvious at home. Senior cats, kittens, and cats with diabetes, kidney disease, liver disease, high blood pressure, cancer, or recent trauma should be seen especially quickly.

You may be able to monitor briefly at home only if the seizure was very short, your cat recovered fully, there is no known toxin exposure, and your vet has already evaluated your cat for this problem before. Even then, call your vet the same day for guidance. Keep a seizure log with the date, time, length, what the episode looked like, recovery time, and any possible triggers.

During the event, focus on safety. Move objects away, keep stairs blocked, lower noise and light, and do not put your hands near your cat's mouth. Cats do not swallow their tongues during seizures, but they can bite without meaning to. A phone video can be one of the most helpful things you bring to your vet.

Your vet will start with triage and stabilization if your cat is still seizing or not recovering normally. Emergency treatment may include oxygen support, IV access, temperature control, blood sugar testing, and anti-seizure medication such as a benzodiazepine. If seizures continue, your cat may need hospitalization for repeated medication doses, IV fluids, and close monitoring.

Once your cat is stable, your vet will ask detailed questions about the episode. Expect questions about how long it lasted, whether there were multiple seizures, what your cat did before and after, possible toxin exposure, recent trauma, current medications, and any history of kidney disease, liver disease, diabetes, high blood pressure, or cancer. A video of the event can help your vet tell a seizure apart from fainting, vestibular episodes, pain, or abnormal behavior.

Basic testing often includes a physical exam, neurologic exam, bloodwork, urinalysis, and blood pressure measurement. Depending on the case, your vet may also recommend FeLV/FIV testing, chest radiographs, abdominal imaging, bile acids, infectious disease testing, or toxin-related consultation. These tests help identify metabolic and systemic causes that can trigger seizures.

If routine testing does not explain the seizures, your vet may discuss referral for MRI or CT imaging and sometimes cerebrospinal fluid testing to look for brain inflammation, infection, or tumors. Long-term treatment depends on the cause and seizure pattern. Some cats need anti-seizure medication and monitoring over time, while others improve when the underlying disease is treated.

If your cat has a seizure at home, stay calm and focus on preventing injury. Move nearby objects, block access to stairs, dim the lights, and reduce noise. Do not hold your cat down and do not put your fingers or any object in the mouth. Time the seizure on your phone if you can, because the duration helps your vet decide how urgent the situation is.

After the seizure, many cats are confused, restless, wobbly, hungry, or temporarily less responsive. Keep your cat in a quiet, padded, low-stimulation room until they are more normal. Offer small amounts of water once they are fully awake. If they seem blind, panicked, or unsteady, keep them away from furniture edges, windows, and other pets until they recover.

A seizure diary is one of the most useful home tools. Write down the date, time, length, what the seizure looked like, what happened before it started, how long recovery took, and whether there could have been a trigger such as a new medication, toxin, loud sound, missed meal, or illness. Video is even better if you can record safely.

Do not stop or change prescribed anti-seizure medication without talking to your vet. Sudden medication changes can make seizures worse. If your cat has another seizure lasting more than 2-5 minutes, has repeated seizures in a day, seems unable to recover, or you suspect poisoning, go to emergency care right away.