Managing Epilepsy in dogs

Medication, Monitoring & Long-Term Control

Canine epilepsy is one of the most common chronic neurological conditions in dogs in the UK. Management is typically long-term and guided by a veterinary surgeon. Commonly prescribed anti-epileptic medicines include phenobarbital, imepitoin, and potassium bromide. In some cases, additional medicines such as levetiracetam, zonisamide, or diazepam may be used under veterinary direction, including within the UK prescribing cascade where appropriate.

What Does a Seizure Look Like?

Generalised seizures (previously called “grand mal” seizures) are the most common presentation in idiopathic epilepsy.

• Sudden collapse and loss of consciousness
• Limb paddling or rigid extension
• Jaw chomping or facial twitching
• Salivation or foaming
• Urination or defecation during the episode
• Disorientation, pacing or restlessness after recovery (post-ictal phase)

Most seizures last between 30 seconds and 2 minutes. Seizures lasting longer than 5 minutes, or multiple seizures within 24 hours (cluster seizures), require urgent veterinary attention.

Treatment Goals in Canine Epilepsy

The goal of treatment is not always complete elimination of seizures. Instead, therapy aims to:

• Reduce seizure frequency
• Reduce seizure severity and duration
• Reduce the risk of cluster seizures
• Maintain quality of life with minimal adverse effects

Most dogs diagnosed with epilepsy require ongoing, long-term management once treatment is initiated. Treatment plans are individualised and adjusted over time by the prescribing veterinary surgeon.

Although seizures are distressing to witness, many dogs achieve stable and meaningful control with consistent treatment, monitoring, and regular veterinary review.

Licensed Long-Term Anti-Epileptic Medications

Phenobarbital for Dogs

Phenobarbital acts on inhibitory pathways within the brain and has been widely used in the management of canine epilepsy. Its use, dosing and monitoring are determined by a veterinary surgeon.

Common side effects:

• Increased thirst and urination
• Increased appetite
• Sedation (often transient)
• Ataxia during dose adjustments

Monitoring:

• Blood level monitoring
• Liver enzyme checks
• Routine blood tests as advised by your vet

Imepitoin (Pexion) for Dogs

Imepitoin is licensed in the UK for use in dogs with idiopathic epilepsy. It works by modulating brain activity, and treatment plans are tailored and reviewed by the prescribing veterinary surgeon.

Common side effects:

• Mild sedation
• Transient ataxia
• Increased appetite

Monitoring requirements vary between patients and should be guided by your vet.

Potassium Bromide for Dogs

Potassium bromide (e.g Libromide, Epilease, Vetbromide) may be used as part of a treatment plan in dogs with epilepsy, often alongside other medications where appropriate. Its use is determined by a veterinary surgeon based on the individual case.

Common side effects:

• Sedation
• Ataxia
• Gastrointestinal upset

Monitoring:

• Blood level monitoring where advised
• Maintaining a consistent diet, particularly salt intake

Off-Label (Cascade) Medications for Refractory Epilepsy

In some cases, seizures may not be adequately controlled with licensed medicines alone. In these situations, a veterinary surgeon may prescribe additional treatments under the UK prescribing cascade. These decisions are made on a case-by-case basis and require ongoing veterinary oversight.

Levetiracetam for Dogs

Levetiracetam may be included as part of a broader treatment plan in dogs with ongoing seizure activity, particularly where additional support is needed. Learn more about levetiracetam

Zonisamide for Dogs

Zonisamide may be considered by veterinary surgeons in certain cases as part of ongoing epilepsy management.

Rectal Diazepam for Dogs (Emergency Use)

Diazepam may be prescribed for emergency use at home in dogs at risk of prolonged or cluster seizures, while urgent veterinary care is being arranged.

Supplying Long-Term Epilepsy Medication Safely

Anti-epileptic medicines are prescription-only veterinary medicines and must be supplied against a valid veterinary prescription.

All treatment decisions, including medicine selection, dosing, and monitoring, must be made by a veterinary surgeon to ensure safe and appropriate long-term care.

View Our Prescription Policy

Frequently Asked Questions About Canine Epilepsy

How long does phenobarbital take to work in dogs?

Phenobarbital typically reaches steady blood levels within around 10–14 days, but individual response and dosing adjustments are determined by a veterinary surgeon.

Can dogs live a normal life with epilepsy?

Many dogs live full and happy lives with appropriate long-term management, regular monitoring, and veterinary support.

What are cluster seizures in dogs?

Cluster seizures occur when a dog has multiple seizures within a 24-hour period and require urgent veterinary attention.

This article is for educational purposes only and does not promote or advertise prescription-only veterinary medicines. Any treatment should only be used under veterinary direction and supplied against a valid veterinary prescription where required.

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