Cluster seizures can be frightening for pet owners and potentially dangerous for affected dogs. Recognizing when seizures are clustering and knowing when to seek emergency veterinary care can make an important difference.
Is your pet having a seizure right now?
Keep them safe and time it. Seek urgent veterinary advice after a first seizure, and go to the nearest emergency vet now if it continues for several minutes or repeats within 24 hours.
What are cluster seizures?
Cluster seizures are defined as two or more seizures occurring within a 24-hour period, with the dog regaining consciousness between seizures. [1]
Cluster seizures are relatively common in dogs with idiopathic epilepsy, where no underlying cause is identified after appropriate investigation. In one study of 407 dogs with idiopathic epilepsy, cluster seizures were documented in 41% of dogs. German Shepherds and Boxers were overrepresented, and intact dogs were more likely to experience clusters in that study. However, cluster seizures can occur in dogs of any breed and are not limited to idiopathic epilepsy. Dogs with structural brain disease, such as brain tumors or inflammatory conditions like meningitis, may also experience them. [2]
Why are cluster seizures dangerous?
Repeated seizures can place considerable stress on the brain and may become increasingly difficult to control. Cluster seizures can progress to status epilepticus, particularly when seizures occur close together or become more frequent.
Cluster seizures should be taken seriously, even if your dog appears to recover between episodes. If your dog has never experienced a cluster before, or you have not been given a seizure-management plan by your veterinarian, contact an emergency veterinary hospital for guidance.
How are cluster seizures treated?
Treatment aims to stop ongoing seizures and prevent further episodes.
Your veterinarian may prescribe rescue medication for use at home when a cluster begins. Medications such as diazepam (Valium), administered rectally, or midazolam, administered into the nostrils, may be included in an individualized plan. Some dogs may also receive a short-term course of another antiseizure medication, such as levetiracetam (Keppra), to help prevent additional seizures. [1]
Rescue medications do not always stop a cluster. Dogs with ongoing seizures may require hospitalization, injectable medications and close monitoring. In difficult-to-control cases, anesthetic medications such as propofol may be necessary to achieve seizure control. These treatments require veterinary supervision. [1]
Never give rescue medication unless it has been prescribed for your dog and you understand exactly when and how to use it.
When should I take my dog to an emergency veterinarian?
Seek immediate emergency veterinary care if:
- A seizure lasts five minutes or longer.
- Your dog has repeated seizures without regaining consciousness between them.
- Seizures are occurring rapidly or your dog is not recovering normally.
- Your dog is experiencing a cluster and you do not have a veterinary-approved plan for managing it.
While a seizure is occurring, move nearby hazards away, keep your hands clear of your dog’s mouth and time the episode. Do not attempt to restrain your dog or put anything in its mouth.
Keeping a seizure diary helps you and your veterinarian see when seizures start to cluster.
References
- Charalambous M, Muñana K, Patterson EE, Platt SR, Volk HA. (2024). ACVIM Consensus Statement on the Management of Status Epilepticus and Cluster Seizures in Dogs and Cats. Journal of Veterinary Internal Medicine, 38(1), 19–40. Read the consensus statement
- Monteiro R, Adams V, Keys D, Platt SR. (2012). Canine idiopathic epilepsy: prevalence, risk factors and outcome associated with cluster seizures and status epilepticus. Journal of Small Animal Practice, 53(9), 526–530. Read the study abstract
This article is for education only and doesn’t replace advice from your veterinarian.
Related guides
What to do during a seizure
Keep your dog safe and time it.
Keppra (levetiracetam) for dogs
How it works and what to expect.
Seizures in dogs
Why dogs have seizures.
Seizure Diary
Record seizures, medications and videos.