My kitten died after dewormer. Was it caused by the medication?
I'm very sorry to hear about the loss of your kitten! How awful. To answer your question, the odds that his death was related to the dewormer he received at the vet are essentially zero. All of the commonly-used dewormers in the US are extremely safe, and I have never seen a single serious problem related to a dose of dewormer in my entire career. It's much more likely that your kitten had some type of unrelated illness that caused his death.
If you want to try and find out what happened, the only way to know would be to have an autopsy done, called a necropsy in animals. Your veterinarian should be able to advise you on where you can have this done, if it's something you want to pursue. Again, I'm very sorry for loss.
Updated on September 23rd, 2025