Dog - Epilepsy

Epilepsy describes a condition resulting in recurrent fits (seizures or convulsions) which arise from a non-progressive ('stable' or not getting worse) brain disorder. Definitions of epilepsy vary. Please refer to our handout on Convulsions, fits and seizures. One definition is 'any condition in which seizures occur'. Thus fits resulting from a severe blow on the head could be described as epilepsy. It is probably less confusing if epilepsy is reserved for a series of fits resulting from an abnormality in the brain which, on investigation, is found not to be progressive.

What are the causes?

• Some fits are hereditary. This is inherited epilepsy.
• Others can be the result of a previous brain condition which has healed but left the brain in a 'seizure prone' condition. An example is the dog that has had a blow on the head, which responded to treatment but has left the dog with sufficient brain injury that periodically there is seizuring. This is known as acquired epilepsy.
• Sometimes despite exhaustive tests no causes can be found. This is idiopathic epilepsy.

Is idiopathic epilepsy inherited?

Many types of idiopathic epilepsy appear to be more common in certain strains or families of dogs and thus may be inherited. Conversely, it is common to find that dogs considered to have inherited epilepsy often show no abnormality following extensive clinical examination and tests. It is not uncommon to find that inherited and idiopathic epilepsy are terms that are used synonymously (for the same thing). It is important however to be aware that not all cases of idiopathic epilepsy are inherited and vice-versa.

My dog has had two fits. Does this mean he is epileptic?

Not necessarily. It is important to differentiate between fits and epilepsy (see handout on Convulsions, fits and seizures). Sometimes a dog will have a seizure and without any treatment recover and never have another one. Epilepsy refers to the condition of recurrent fits.

I thought that was status epilepticus?

Status epilepticus describes the condition when the dog goes from one fit into another without regaining consciousness. Status epilepticus can result in brain damage. It is a life-threatening condition that requires urgent veterinary treatment.

When epilepsy is diagnosed is it imperative to treat with anticonvulsants?

This depends on many factors, two of which are seizure frequency and severity. Anticonvulsant therapy is not without side effects, also it is important that once started it is never stopped abruptly. In consequence although clusters of fits may have occurred, if these are mild, alternative therapies may be employed before specific anticonvulsant therapy is prescribed.

Is epilepsy curable?

Some dogs do appear to recover spontaneously but this is rare. Often the condition can be successfully controlled with anticonvulsive therapy but most dogs remain epileptics for the rest of their lives. With close co-operation between the vet and the owner and regular monitoring most dogs are able to enjoy a normal of life.