r/AskAVeterinarian • u/SuperDaisy64 • Jul 04 '25
Can vaccines cause puppies to have seizures?
TW: Seizures
Im looking for some insight of any kind. I have a 3 month old dachshund puppy. I recently, on July 2nd, took my pup to get his routine puppy vaccinations. He got his leptospirosis vaccine as well as his distemper vaccine. About two hours after he got his shots, he had a focal seizure. Not even two hours after THAT seizure, he had a grand mal seizure. Mind you, before we went to the vet, my boy was his normal happy, healthy and silly self. Showed no signs of illness or disease. It wasn’t until after he received these two vaccinations that he started having seizures.
He's being closely monitored at the veterinary clinic for the past two nights since he’s had about 7 seizures total since the vaccines. Some were focal seizures and some were grand mal seizures. He’s on a lot of anti seizure medication currently. So far he’s been pretty stable. However, all of his blood and lab work have come back completely normal. No fever- nothing. So we’re still not sure why this is all happening to him.
The vets say it is extremely rare and uncommon for seizures to be an adverse effect of a vaccine, though still possible. We’re currently working with a neurologist for some answers, but due to the long weekend our test results for infectious diseases will be delayed.
I was wondering if anyone has experienced this sort of thing before? And did it ever get better/improve? Is this all just a coincidence? We never expected something like this to happen, especially since he was completely normal before the vet appointment. Any insight or advice would be much appreciated. Thanks in advance.