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My dog's seizures stopped with phenobarbital. Is it epilepsy or tumor?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 5 years and 2 months old | 23 lbs

My dog had 2 seizures in decandfeb took him to the vet. said it could be low blood sugar.Gave vitamins and antibiotics 3weeks later he had 8seizures in 29 hours 3/4 hours apart took him to the vet again and had a CBC this is the result( pic below) she said the result we're ok and prescribed phenobarbital for his seizures said could be epilipsy or tumor ( can't afford MRI now)but Aftertaking the medication for3days he hasn't had any seizure.For4 years he hasn't had 1seizure Could it be a tumor?

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Answered By Lindsey Edwards MVB, BSc, IVCA

Veterinarian

Published on March 6th, 2020

The good response to phenobarb makes a tumour less likely - these tend to respond very poorly and continue to have increasing seizures despite medication. His age also makes epilepsy likely so I would continue with the treatment as prescribed for 3-6months and possibly taper down carefully after this if no seizures occurring, or maintain as is if stable and limited side effects

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