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Dog seizures: Phenobarbital side effects on liver, kidney, heart?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed

My dog is 9 yrs old 11 kg n yesterday she'd extreme seizures.she fell down n then went completely stiff for few minutes n wasn't even blinking eyes then she fell down again n started kicking her legs very fastly but struggling.then she was unable to walk properly even after seizures.then again she'd seizures.vet gave 30mg for 11kg dog for lifetime twice daily.her liver enzymes were slightly elevated in feb.how her liver, kidney,heart b affected n will GALLSTONES occur? what if I don't give pheno

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Answered By Tomasz Wnuk

Veterinarian

Published on June 19th, 2020

Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. I assume Chhutki was prescribed phenobarbital for seizures. This medication can produce transient elevation of liver enzymes, increased thirst, increased appetite, lethargy and weight gain. It does not affect kidney or heart function and does not cause gallstones formation. If you don't use any anti-epileptic medications for your dog, she will likely have more seizures, which can be longer/more severe than her first seizure.

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