CONDITION
Epilepsy in Cats
Why this matters now
Feline epilepsy often becomes apparent in young to middle-aged cats, typically between one and seven years of age, though it can occur at any life stage. Idiopathic epilepsy tends to emerge once a cat has matured past kittenhood, while symptomatic epilepsy from underlying disease may appear at various ages depending on the cause.
The course of feline epilepsy varies considerably between individuals. Some cats experience infrequent, well-controlled seizures with medication, while others may have more complex seizure patterns that prove challenging to manage. Over time, seizure frequency or character may change, and the veterinary team may need to adjust management strategies accordingly. Monitoring seizure patterns through careful record-keeping can help inform these decisions.
Signals & patterns
Early signals
Brief episodes of unusual behaviour
Cats may show sudden behavioural changes lasting seconds to minutes, such as staring blankly, appearing confused, or acting as though chasing something invisible. These subtle presentations can precede or represent partial seizures.
Facial twitching or chewing movements
Rhythmic movements of the face, jaw, or whiskers may indicate focal seizure activity. Some cats display lip-smacking or appear to be chewing on nothing.
Excessive salivation during episodes
Drooling or hypersalivation may accompany seizure activity in cats, sometimes as the most obvious sign of an episode.
Sudden changes in awareness
A cat may suddenly become unresponsive, stare into space, or fail to acknowledge their name or surroundings, then return to normal after a brief period.
Later signals
Generalised convulsions
Full tonic-clonic seizures with loss of consciousness, stiffening, and rhythmic jerking of the limbs may develop. The cat typically falls on their side and may paddle their legs.
Prolonged post-seizure disorientation
After a seizure, cats may show extended periods of confusion, pacing, temporary blindness, or unusual behaviour. This postictal phase can last from minutes to hours.
Increasing seizure frequency
Some cats may experience seizures more frequently over time, or seizures may cluster together within short periods.
Click to read about the biological mechanisms
How this is usually investigated
Investigating feline epilepsy typically involves ruling out other causes of seizures before reaching a diagnosis of idiopathic epilepsy. The approach depends on the cat's age, seizure characteristics, and overall health status.
Detailed history and seizure diary
Comprehensive blood tests
Blood pressure measurement
Advanced imaging (MRI)
Cerebrospinal fluid analysis
Options & trade-offs
Managing feline epilepsy typically centres on reducing seizure frequency and severity while maintaining quality of life. Different approaches may suit different cats depending on their individual circumstances.
Anti-epileptic medication
Daily medications such as phenobarbital or levetiracetam may be used to reduce seizure frequency and severity.
Trade-offs: Finding the right medication and dose can take time. Regular blood monitoring may be needed to check drug levels and organ function. Some cats experience sedation or increased appetite, particularly when starting treatment.
Combination therapy
When single medications do not provide adequate control, additional anti-epileptic drugs may be added.
Trade-offs: Using multiple medications increases the complexity of treatment and the potential for side effects. However, some cats achieve better seizure control with combination therapy than with any single medication.
Environmental management
Reducing potential triggers by minimising sudden loud noises, maintaining routine, and creating calm spaces for recovery after seizures.
Trade-offs: Environmental measures alone rarely control epilepsy but may complement medical management and improve overall wellbeing.
Treatment of underlying conditions
When seizures are secondary to identifiable causes, addressing those conditions may reduce or eliminate seizure activity.
Trade-offs: Not all underlying causes are treatable, and some cats may still require anti-epileptic medication even when primary conditions are managed.
Common misconceptions
"All seizures look the same in cats"
Feline seizures can present in many ways, from classic convulsions to subtle facial twitching, behavioural changes, or episodes of drooling. Partial seizures in cats may look quite different from what owners expect based on canine or human epilepsy.
"Seizures always indicate brain disease"
While seizures originate from abnormal brain activity, they can be triggered by problems elsewhere in the body. Metabolic issues, toxins, and other systemic conditions can all cause seizures in cats with otherwise normal brains.
"Medication will completely stop all seizures"
The goal of anti-epileptic therapy is typically to reduce seizure frequency and severity rather than eliminate seizures entirely. Many cats still experience occasional breakthrough seizures even with good management.
Keeping a detailed seizure diary can help track patterns and assess how well management strategies are working. Recording the date, time, duration, and characteristics of each episode provides valuable information for veterinary consultations. Understanding what postictal behaviour looks like for your individual cat can help distinguish seizure-related changes from other concerns.
Last reviewed: 24 April 2026 · Dr Alastair Greenway MRCVS