- Vomiting
- Diarrhea
- Lethargy
- Seizures
- Liver damage
- Kidney failure
In some cases, an overdose of flea medicine can even be fatal. If you think your dog may have received too much flea medicine, contact your veterinarian immediately.
It is important to follow the dosing instructions on the flea medicine package carefully and to only give your dog the recommended dose. If you have any questions about how much flea medicine to give your dog, talk to your veterinarian.