Epilepsy in Dogs: Seizures, Treatment and Long-Term Management
Epilepsy is one of the most common chronic neurological conditions affecting dogs. It causes recurrent seizures due to abnormal electrical activity within the brain.
There are several possible causes of seizures in dogs, and not every dog that experiences a seizure has epilepsy. Before diagnosing epilepsy, a veterinary surgeon will consider the dog's age, medical history, examination findings and the pattern of the seizures, as well as whether further investigations are required.
Many dogs diagnosed with epilepsy can maintain a good quality of life with appropriate long-term management, careful monitoring and a treatment plan tailored to the individual dog.
What Does a Seizure Look Like?
Seizures can look very different between dogs. Some involve the whole body, while others may cause much more subtle or localised signs.
During a Generalised Seizure
- Sudden collapse
- Loss of consciousness
- Rigid limbs or paddling movements
- Jaw movements or facial twitching
- Salivation or foaming
- Urination or defecation
After a Seizure
- Disorientation
- Pacing or restlessness
- Temporary changes in vision
- Increased thirst or hunger
- Weakness or unsteadiness
- Sleeping or unusual tiredness
Useful Information to Record
- Date and time
- Approximate duration
- What happened before the seizure
- What the seizure looked like
- Recovery time
- Any additional seizures
A seizure lasting around five minutes or longer requires urgent veterinary attention. Multiple seizures occurring over a short period, particularly without full recovery between them, can also become an emergency.
If you are concerned about the duration, frequency or severity of your dog's seizures, contact your veterinary practice or emergency veterinary service promptly.
What Causes Epilepsy in Dogs?
Seizures can result from a number of different problems. These may include disease within the brain itself, abnormalities elsewhere in the body that affect brain function, exposure to certain toxins, or epilepsy where no underlying structural cause is identified.
Idiopathic epilepsy is diagnosed when a dog experiences recurrent epileptic seizures and investigations do not identify another underlying cause. Genetics are believed to play an important role in some breeds and family lines.
The age at which seizures begin can help guide investigation. Your veterinary surgeon may recommend blood tests and, depending on the individual case, further investigation or referral for advanced neurological assessment.
When Is Long-Term Treatment Considered?
Not every dog that has a single seizure will immediately require long-term anti-epileptic treatment.
The decision to begin treatment is made by the veterinary surgeon after considering factors such as:
- How often seizures occur
- The duration and severity of individual seizures
- Whether cluster seizures occur
- Whether the dog has experienced prolonged seizure activity
- Whether seizure frequency is increasing
- The dog's overall health
- The effect of seizures on the dog's quality of life
Once long-term anti-epileptic treatment has been started, consistency is very important. Treatment should not normally be altered or stopped suddenly unless specifically directed by the veterinary surgeon.
What Are the Goals of Epilepsy Treatment?
Complete elimination of seizures is not always possible. Long-term treatment is generally aimed at achieving the best possible seizure control while maintaining a good quality of life.
Reduce Frequency
Increasing the interval between seizures can significantly improve long-term control and quality of life.
Reduce Severity
Treatment may reduce the duration or severity of individual seizure episodes.
Reduce Complications
Preventing prolonged or closely grouped seizures is an important part of epilepsy management.
Maintain Quality of Life
Treatment plans balance seizure control with possible adverse effects and the individual dog's wellbeing.
Medicines Used in Canine Epilepsy
Several active substances are authorised for veterinary use in dogs with epilepsy in the UK. The most appropriate treatment depends on the individual dog, the seizure pattern, other medical conditions and the prescribing veterinary surgeon's assessment.
Treatment should never be selected or adjusted without veterinary guidance.
Phenobarbital
Phenobarbital is an anti-epileptic active substance that has been used for many years in the long-term management of epilepsy in dogs.
It acts within the central nervous system to reduce the likelihood of seizure activity. Veterinary medicines containing phenobarbital are authorised in the UK for the management of generalised epilepsy in dogs.
Monitoring may include:
- Clinical response and seizure frequency
- Blood phenobarbital concentration where appropriate
- Liver-related blood parameters
- Routine haematology and biochemistry as advised by the veterinary surgeon
Changes such as increased thirst, increased urination, increased appetite, sedation or unsteadiness may occur, particularly when treatment is first started or adjusted. Any concerning or persistent changes should be discussed with the prescribing veterinary surgeon.
Imepitoin
Imepitoin is another active substance authorised for veterinary use in dogs. It acts on signalling pathways within the brain involved in controlling neuronal activity.
It may be used to reduce the frequency of generalised seizures associated with idiopathic epilepsy in suitable dogs following veterinary assessment.
Response varies between individuals. Some dogs achieve very good seizure control, while others may continue to experience seizures and require reassessment of their treatment plan.
Reported effects can include temporary unsteadiness or sleepiness, gastrointestinal signs and changes in appetite or behaviour. Owners should discuss any concerns with their veterinary surgeon.
Potassium Bromide
Potassium bromide is an anti-epileptic active substance used in veterinary medicine for the management of epilepsy in dogs.
Authorised veterinary medicines containing potassium bromide are available in the UK. Depending on the authorised medicine and the individual clinical circumstances, potassium bromide may form part of a long-term treatment plan either alone or alongside another anti-epileptic treatment.
Monitoring may include:
- Seizure frequency and clinical response
- Blood bromide concentrations where appropriate
- Assessment for sedation or unsteadiness
- Monitoring for gastrointestinal effects
Diet is particularly important during potassium bromide treatment because changes in chloride intake can affect bromide concentrations within the body. Owners should therefore discuss significant dietary changes with their veterinary surgeon rather than changing the dog's diet abruptly.
Why Regular Monitoring Matters
Epilepsy treatment is rarely a case of starting a medicine and never reviewing it again.
Regular veterinary review allows the treatment plan to be adjusted according to seizure control, adverse effects, blood test results and changes in the dog's overall health.
Some anti-epileptic treatments require measurement of blood concentrations. Others may require periodic assessment of organ function or general blood parameters.
The exact monitoring schedule depends on the active substance being used and the individual dog.
Keep a Seizure Diary
A seizure diary is one of the most useful tools for monitoring a dog with epilepsy.
Record the date, time and approximate duration of every seizure, together with any unusual events before or afterwards. Videos can also be extremely useful for your veterinary surgeon if it is safe to record the episode.
Over time, this information can help identify changes in seizure frequency or severity and allows the veterinary surgeon to assess how well the current treatment plan is working.
What Should I Do While My Dog Is Having a Seizure?
- Stay calm and note the time the seizure began.
- Move nearby objects that could cause injury where it is safe to do so.
- Keep your dog away from stairs, water or other hazards.
- Do not put your hands or objects inside your dog's mouth.
- Reduce bright lights and unnecessary noise where possible.
- Record the seizure if it is safe to do so.
- Follow any individual emergency plan previously provided by your veterinary surgeon.
Dogs are not conscious of their actions during a generalised seizure and may accidentally bite if handled around the mouth.
Living With a Dog With Epilepsy
A diagnosis of epilepsy can initially feel overwhelming, particularly after witnessing a first seizure.
However, many dogs with epilepsy continue to enjoy active and fulfilling lives. Good long-term management relies on consistent treatment where prescribed, appropriate monitoring, recognising changes in seizure patterns and maintaining good communication with the veterinary practice.
Treatment plans may need to change over time. A treatment that works well for one dog may not be appropriate for another, which is why epilepsy management is always individualised.
Frequently Asked Questions
Can a dog have one seizure and never have another?
Yes. A single seizure does not automatically mean that a dog has epilepsy. Your veterinary surgeon will consider the circumstances and decide whether investigation or monitoring is appropriate.
Can dogs live a normal life with epilepsy?
Many dogs with epilepsy maintain a very good quality of life with appropriate veterinary management. The outlook varies according to seizure frequency, severity, underlying cause and response to treatment.
What are cluster seizures?
Cluster seizures describe multiple seizures occurring within a relatively short period. They can become serious and should prompt urgent veterinary advice, particularly if seizures continue to recur or the dog does not recover normally between episodes.
Why does my dog need blood tests for epilepsy medication?
Some anti-epileptic treatments require blood monitoring to assess medicine concentrations, organ function or other parameters. The tests required and their frequency depend on the treatment being used and the individual dog.
Can I stop my dog's epilepsy medication if the seizures have stopped?
Do not stop or alter long-term anti-epileptic treatment without speaking to your veterinary surgeon. Abrupt changes can cause seizure control to deteriorate and may be dangerous in some circumstances.