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Why isn't my 2-month-old calf's phenytoin medication working?

Updated On September 23rd, 2025

hello i have a calf. She is 2 months old and is having seizures from birth. doctor prescribed PHENYTOIN TABLETS i.e EPTOIN(NAME OF THE DRUG). But the medication isnt helping please help me

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on December 18th, 2016

The problem with giving your calf medication is that the medication that may work is very expensive for such a large animal. Your calf may have been infected with a disease (BVD) while he was in his mother's womb and these seizures may not ever go away. Phenytoin may not work right away, so you should give it for a few more days and see whether it does indeed reduce the seizures. Do not increase the dose without your doctor telling you to do so, as phenytoin has only a very narrow therapeutic range. Ask your veterinarian about a dosage adjustment or change of medication available for seizures in your calf. if the medications do not work, the problem may be another one, such as liver failure, a liver shunt, metabolic disease.

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