A New Hope for Seizures? Exploring CBD’s Potential for Dogs with Epilepsy

Few things are more distressing for a dog owner than watching their beloved companion suffer a seizure. The trembling, the confusion, the helplessness — it can leave even the most composed pet parent shaken.

Epilepsy is one of the most common neurological conditions in dogs, affecting an estimated one to five percent of the canine population. And while conventional anticonvulsant medications have long been the standard of care, they don’t work for every dog.

That reality has driven a growing number of veterinarians and pet owners to explore an unlikely ally: cannabidiol, better known as CBD.

Understanding Canine Epilepsy

Epilepsy in dogs is characterized by recurrent, unprovoked seizures caused by abnormal electrical activity in the brain. It can be classified as idiopathic — meaning no identifiable underlying cause — or structural, resulting from conditions like brain tumors, infections, or head trauma. Idiopathic epilepsy is the most common form, and it tends to appear in dogs between the ages of one and five.

Traditional treatments typically include medications such as phenobarbital and potassium bromide. While these drugs are effective for many dogs, they can come with significant side effects, including excessive sedation, increased thirst and appetite, liver damage over time, and behavioral changes. Perhaps most frustratingly, roughly one-third of epileptic dogs remain poorly controlled on standard medications, leaving their owners searching for alternatives.

What Exactly Is CBD?

CBD is one of over a hundred naturally occurring compounds found in the cannabis plant. Unlike tetrahydrocannabinol (THC), the psychoactive component responsible for the “high” associated with marijuana, CBD does not produce intoxication. It interacts with the body’s endocannabinoid system, a complex network of receptors found throughout the brain and body that plays a role in regulating pain, mood, inflammation, and — critically for this discussion — neurological function.

Dogs, like all mammals, have an endocannabinoid system, which is why researchers believe CBD may offer therapeutic benefits across species. Importantly, products designed for pets are derived from hemp and contain negligible amounts of THC, which can be toxic to dogs even in small quantities.

What Research Shows

The most notable study to date on CBD and canine epilepsy was conducted by researchers at Colorado State University’s College of Veterinary Medicine and Biomedical Sciences. Published in the Journal of the American Veterinary Medical Association in 2019, the randomized, placebo-controlled trial evaluated CBD oil in dogs with idiopathic epilepsy that were already receiving conventional antiepileptic treatment.

The results were encouraging. Dogs that received CBD experienced a significant reduction in seizure frequency — an average decrease of 33 percent compared to the placebo group. While CBD did not eliminate seizures entirely for most dogs in the study, the reduction was meaningful enough to suggest real therapeutic potential. The researchers also noted that the CBD was generally well tolerated, with the most common side effect being a mild elevation in a liver enzyme called alkaline phosphatase.

Subsequent studies have continued to build on these findings. Research published in 2023 explored higher doses and longer treatment durations, with several teams reporting further evidence of reduced seizure activity. Some studies have also suggested that CBD may work synergistically with traditional medications, potentially allowing veterinarians to lower doses of drugs like phenobarbital and reduce their associated side effects.

What Pet Owners Should Know

Despite the promising early evidence, experts caution that CBD is not a miracle cure. It should be viewed as a potential complementary therapy rather than a replacement for conventional treatment. Dogs with epilepsy require careful veterinary management, and any changes to a treatment plan — including the addition of CBD — should be made under professional guidance.

Quality and consistency of CBD products are also important considerations. The pet CBD market remains loosely regulated, and independent testing has revealed that many products on shelves contain inaccurate levels of CBD. Pet owners interested in trying CBD should look for products that use Full-Spectrum Hemp Oil, and that have been independently tested by a third-party laboratory and that provide a certificate of analysis. Choosing products specifically formulated for pets, rather than repurposing human CBD products, is also advisable.

Dosing is another area where veterinary input is essential. The appropriate amount of CBD can vary based on a dog’s size, the severity of their condition, and other medications they may be taking. Starting with a low dose and gradually increasing it while monitoring the dog for both benefits and side effects is the approach most recommended.

A Changing Landscape

The conversation around CBD in veterinary medicine has shifted considerably in recent years. Once dismissed by many in the profession, it is now the subject of serious scientific inquiry at major veterinary institutions. Several states have updated their laws to allow veterinarians to discuss CBD with clients, and professional organizations have called for more research funding to better understand its safety and efficacy.

For owners of epileptic dogs — especially those whose pets have not responded well to traditional medications — CBD represents something powerful: hope. Not the reckless kind built on hype and marketing, but the cautious, evidence-informed kind that comes from watching real science unfold in real time.

The journey from anecdote to established treatment is a long one, and CBD still has miles to go. But for dogs who seize less often, who seem more comfortable, who get to enjoy a few more peaceful afternoons napping in the sun — those early miles already matter.

Always consult your veterinarian before introducing CBD or any supplement into your dog’s health regimen. This article is for informational purposes only and is not a substitute for professional veterinary advice.

REFERENCES & SOURCE INFORMATION
McGrath, S., Bartner, L. R., Rao, S., Packer, R. A., & Gustafson, D. L. (2019). Randomized blinded controlled clinical trial to assess the effect of oral cannabidiol administration in addition to conventional antiepileptic treatment on seizure frequency in dogs with intractable idiopathic epilepsy. Journal of the American Veterinary Medical Association, 254(11), 1301–1308. https://doi.org/10.2460/javma.254.11.1301

McGrath, S., Bartner, L. R., Rao, S., Kogan, L. R., & Hellyer, P. W. (2018). A report of adverse effects associated with the administration of cannabidiol in healthy dogs. Journal of the American Holistic Veterinary Medical Association, 52, 34–38.

Garcia, G. A., Kube, S., Carrera-Justiz, S., Tittle, D., & Wakshlag, J. J. (2022). Pharmacokinetics of cannabidiol following a single oral dose in dogs. Frontiers in Veterinary Science, 9, 958562.

Corsato Alvarenga, I., Panickar, K. S., Engel, H., & Aldrich, C. G. (2023). Systematic review of the effects of cannabidiol on dogs. Journal of Veterinary Pharmacology and Therapeutics, 46(5), 289–304.

Podell, M., Volk, H. A., Berendt, M., et al. (2016). 2015 ACVIM small animal consensus statement on seizure management in dogs. Journal of Veterinary Internal Medicine, 30(2), 477–490.

Bonn-Miller, M. O., Loflin, M. J., Thomas, B. F., Marcu, J. P., Hyke, T., & Vandrey, R. (2017). Labeling accuracy of cannabidiol extracts sold online. JAMA, 318(17), 1708–1709.

American Veterinary Medical Association. (2023). Cannabis use and pets. Retrieved from https://www.avma.org/resources-tools/animal-health-and-welfare/cannabis-use-and-pets

Dave Merrell is the founder of Healthy Hemp Pet, established in 2014.  As one of the pioneers in the “hemp for pets” market, Merrell takes pride in producing the cleanest hemp products using organic ingredients.