How to Recognize and Respond to Seizures in Cats

Seizures in cats can signal epilepsy, toxins, metabolic disease or other illnesses. Learn how to spot seizures, first-aid steps, what to observe, and when to seek emergency care.

When to See a Vet

Always contact your veterinarian the first time your cat has a seizure. Seizures are a medical sign — not a behavior problem — until a vet rules out medical causes. Some causes require immediate treatment (toxins, metabolic failure, severe infection) and some cats will need long-term anti-seizure medication. If your cat has any of the red-flag signs below, go to an emergency clinic immediately.

What Is a Seizure?

A seizure is a sudden, excessive, and synchronized electrical discharge in the brain that causes a change in behavior, consciousness, movement, sensation or autonomic function. Seizures in cats range from brief stare-and-freeze episodes to full-body convulsions with loss of consciousness. After a seizure, many cats show a post-ictal period of confusion, disorientation or temporary blindness.

Red Flags — Seek Emergency Care

• A seizure lasting longer than 5 minutes (status epilepticus) or repeated seizures without recovery between them (cluster seizures).
• Difficulty breathing, blue- or gray-colored gums, or collapse.
• Severe hyperthermia (very high body temperature) after a seizure.
• Uncontrolled bleeding or obvious traumatic injury during the seizure.
• Seizure in a pregnant cat or a cat with known serious disease (eg, kidney or liver failure).

Medical Causes (Conditions That Can Cause Seizures)

Seizures are most commonly due to one of these categories:

• Idiopathic (primary) epilepsy: Recurrent seizures with no identifiable structural brain disease or metabolic cause; more commonly recognized in dogs but also occurs in cats.
• Structural brain disease: Tumors, inflammation (meningoencephalitis), stroke, brain trauma, congenital malformations.
• Toxic exposure: Common feline toxins that cause seizures include organophosphates, permethrin (dog flea products applied to cats), certain rodenticides, xylitol (rare in cats), lead, and some human medications.
• Metabolic and systemic causes: Hypoglycemia (low blood sugar), hepatic encephalopathy (liver failure), severe kidney disease (uremia), electrolyte disturbances (eg, low sodium, low calcium), and severe hypoxia.
• Infectious diseases: Feline infectious peritonitis (FIP), toxoplasmosis, rabies (rare in vaccinated populations), and other CNS infections.

Behavioral Causes — Things That Can Mimic Seizures

Some non-neurologic or behavioral events can look seizure-like, especially in cats where signs can be subtle:

• Focal behavioral episodes: Sudden staring spells, freezing, tail-chasing, or repetitive licking can be compulsive or stress-related behaviors rather than seizures.
• Syncope (fainting): Brief collapse from heart disease or low blood pressure may look like a seizure but typically lacks the rhythmic convulsions and often has a triggering event (exercise, excitement).
• Vestibular episodes: Inner-ear problems may cause head tilt, loss of balance and circling without generalized convulsions.
• Sleep-related movements or REM behavior disorders: Dream-related twitching occurs in sleep and the cat is often easily roused.

How to Tell the Difference: Medical vs Behavioral Indicators

Medical seizure indicators:

• Sudden onset with loss of awareness or consciousness.
• Tonic-clonic activity (stiffening then rhythmic paddling/jerking of limbs).
• Autonomic signs: drooling, chomping, foaming, urination, defecation.
• Post-ictal changes: disorientation, pacing, blindness, increased vocalization that lasts minutes to hours.
• No clear environmental trigger and often shorter duration (<2–3 minutes for a single seizure but may be longer).

• Cat remains responsive to you or can be distracted mid-event.
• Repetitive behaviors tied to environment or routines (eg, licking when stressed by visitors).
• Gradual onset and offset, or stereotyped ritualized behaviors.
• No autonomic signs or post-ictal confusion.

First Aid for a Seizuring Cat (What to Do Immediately)

Do not give oral medications or food until the cat is fully alert and swallowing normally.

What to Observe — Information to Gather for Your Vet

Bring as much of the following as you can:

• Video of the event (usually the most helpful single item).
• Exact duration of the seizure and times of onset/offset.
• Description of what the cat did: staring, collapse, paddling, vocalization, urine/stool release, drooling, head-turning, focal twitching.
• Number of seizures and whether they happened back-to-back (cluster).
• Any recent exposure to toxins (pesticides, rodenticides, medications), diet changes, or new plants/chemicals in the home.
• Current medications and supplements (including doses and timing).
• Recent illnesses, vomiting, diarrhea, changes in appetite, drinking, weight loss, or lethargy.
• Age of the cat and any prior neurological problems or head trauma.

Next Steps — Diagnostic and Treatment Pathways

Prevention and Home Care

• Prevent toxin exposure: never use dog permethrin products on cats; keep household chemicals and rodenticides out of reach.
• Maintain regular veterinary care and monitoring of chronic diseases (kidney/liver disease, diabetes).
• Keep a seizure diary with dates, times, duration and video when possible.
• Create a safe recovery area for the cat after an event and minimize stressors where possible.

Reducing Risk During Transport

• Use a secure, well-padded carrier and cover it with a light sheet to keep the cat calm.
• Time the transport: if possible, wait until the cat can swallow and is stable. For ongoing seizures, go immediately to emergency care.

Key Takeaways

• Always see a veterinarian after the first seizure. Seizures are a medical sign that require diagnosis and sometimes urgent treatment.
• Common medical causes include epilepsy, structural brain disease (tumor, inflammation), toxin exposure, and metabolic disorders (hypoglycemia, liver or kidney disease).
• Some behavioral and other non-epileptic events can mimic seizures, but medical causes should be ruled out before assuming a behavioral origin.
• Video of the event, the duration, number of seizures, and any possible toxin exposure are the single most helpful pieces of information for your vet.
• Emergency care is required for seizures longer than 5 minutes, repeated seizures without recovery, breathing difficulty, collapse or severe hyperthermia.

References and Further Reading

• Merck Veterinary Manual — Seizures in Small Animals: https://www.merckvetmanual.com/neurologic-disorders/neurologic-disorders-in-small-animals/seizures-in-small-animals
• American Veterinary Society of Animal Behavior (AVSAB) — Position Statements and resources on behavior and medical evaluation: https://avsab.org
• De Lahunta, A., & Glass, E. Handbook of Veterinary Neurology.
• Plumb, D. C. Plumb's Veterinary Drug Handbook.

Frequently Asked Questions