Epilepsy in Cats: Understanding Seizures, Causes and Long-Term Management

Epilepsy in cats is a neurological condition characterised by recurrent seizures. While less commonly diagnosed in cats than in dogs, seizures can be distressing to witness and may indicate a range of underlying issues, from idiopathic epilepsy to serious systemic disease.

Because seizures can vary in appearance and severity, understanding what they look like, what causes them and how they are managed is essential for any cat owner.

What is Epilepsy?

Epilepsy refers to a condition in which a cat experiences repeated, unprovoked seizures. A seizure is caused by abnormal electrical activity in the brain, leading to sudden, uncontrolled changes in movement, behaviour or consciousness.

Epilepsy can be broadly divided into:

• Idiopathic epilepsy – no identifiable underlying cause
• Structural epilepsy – due to physical abnormalities in the brain
• Reactive seizures – caused by metabolic or toxic disturbances outside the brain

In cats, true idiopathic epilepsy is less common than in dogs, and seizures are more often linked to underlying disease.

What Does a Seizure Look Like in Cats?

Seizures in cats can vary widely in presentation.

Generalised (Grand Mal) Seizures

These involve the whole body and are the most recognisable type.

Signs may include:

• Collapse
• Rigid limbs followed by paddling movements
• Loss of consciousness
• Drooling or foaming at the mouth
• Urination or defecation
• Vocalisation

These episodes typically last from a few seconds to a couple of minutes.

Focal (Partial) Seizures

These affect only part of the brain and may be more subtle.

Signs can include:

• Twitching of the face or limbs
• Repetitive movements (e.g. chewing, licking)
• Sudden behavioural changes
• Dilated pupils
• Unusual aggression or fear

Focal seizures may progress into generalised seizures.

The Phases of a Seizure

Seizures are often described in three stages:

1. Pre-ictal Phase (Aura)

Some cats show changes before a seizure, such as:

• Restlessness
• Hiding or seeking attention
• Vocalisation

Not all cats display this phase.

2. Ictal Phase

This is the seizure itself, where abnormal movements or behaviours occur.

3. Post-ictal Phase

After the seizure, cats may appear:

• Disoriented
• Unsteady
• Temporarily blind
• Hungry or thirsty
• Quiet or withdrawn

This phase can last from minutes to several hours.

Causes of Seizures in Cats

Seizures in cats are often linked to underlying conditions.

Intracranial (Within the Brain)

• Brain tumours
• Inflammation (encephalitis)
• Head trauma
• Congenital abnormalities

Extracranial (Outside the Brain)

• Liver disease (hepatic encephalopathy)
• Kidney disease
• Low blood sugar (hypoglycaemia)
• Toxins (e.g. certain plants, chemicals, medications)
• Electrolyte imbalances

Idiopathic Epilepsy

In some cases, no cause is identified despite thorough investigation. This is less common in cats than in dogs.

Diagnosis

Diagnosing epilepsy involves identifying whether seizures are idiopathic or caused by an underlying condition.

A veterinary work-up may include:

• Detailed history – including frequency and nature of seizures
• Physical and neurological examination
• Blood tests – assessing organ function and metabolic causes
• Urinalysis
• Imaging (MRI or CT scan) – to evaluate the brain
• Cerebrospinal fluid (CSF) analysis – in some cases

Diagnosis is often a process of ruling out other causes.

When is Treatment Needed?

Not all cats require immediate long-term medication after a single seizure.

Treatment is typically recommended if:

• Seizures occur frequently
• Seizures are severe or prolonged
• Cluster seizures occur (multiple seizures in a short period)
• There is an underlying condition requiring management

Treatment Options

Anti-Seizure Medication

Common medications include:

• Phenobarbital – one of the most commonly used drugs
• Levetiracetam – often used for additional control
• Diazepam – sometimes used for emergency control

These medications aim to reduce seizure frequency and severity rather than cure the condition.

Treating Underlying Causes

If an underlying condition is identified, treatment is directed at that cause (e.g. managing liver disease or removing a tumour).

Emergency Care

Prolonged seizures (lasting more than 5 minutes) or repeated seizures without recovery (status epilepticus) are medical emergencies requiring immediate veterinary intervention.

Living with a Cat with Epilepsy

Many cats with epilepsy can live good quality lives with appropriate management.

Key considerations include:

• Giving medication consistently and as prescribed
• Keeping a seizure diary to track frequency and triggers
• Minimising stress and maintaining routine
• Avoiding known toxins

Regular veterinary check-ups are essential to monitor response to treatment and adjust medication if needed.

What to Do During a Seizure

If your cat has a seizure:

• Stay calm
• Do not attempt to restrain your cat
• Remove nearby objects to prevent injury
• Keep hands away from the mouth
• Time the seizure if possible

After the seizure, provide a quiet, safe space while your cat recovers.

When to Seek Urgent Veterinary Care

Immediate veterinary attention is required if:

• A seizure lasts longer than 5 minutes
• Multiple seizures occur within a short period
• Your cat does not recover normally after a seizure
• This is your cat’s first seizure
• Your cat appears seriously unwell

Prompt care is critical in preventing complications.

Prognosis

The outlook for cats with epilepsy varies depending on the cause.

• Idiopathic epilepsy – often manageable with medication
• Underlying disease – prognosis depends on the specific condition

Many cats achieve good seizure control with appropriate treatment, although lifelong management may be required.

Conclusion

Epilepsy in cats is a complex condition that can be alarming but is often manageable with the right approach. Because seizures in cats are frequently linked to underlying disease, thorough investigation is essential.

Recognising the signs, responding appropriately during an episode and working closely with your vet can help ensure the best possible outcome. With consistent care and monitoring, many cats with epilepsy can continue to live comfortable and fulfilling lives.