Home › Can my pet eat this? › Permethrin (Dog Flea Treatment)
🐜 Is permethrin flea treatment poisonous to cats?
🔴 Yes. It's dangerous.
👉 What to do right now
- FELINE EMERGENCY.
- Wash cat immediately with dish soap.
- Emergency vet.
- Methocarbamol (muscle relaxant) is primary treatment.
⛔ Don't
- Apply dog flea products to cats
- Allow cats to groom permethrin-treated dogs
⚖️ How much is too much?
Harmful amounts depend on your pet's body weight.
🐱 CatsAny amount — even grooming a recently treated dog
👀 Signs to watch for
- Violent muscle tremors
- Seizures
- Hypersalivation
- Incoordination
- Death
⏱️ When do signs show up?
30 min–3 hours
🔬 Why is it harmful?
Cats lack hepatic glucuronidase to metabolize permethrin. Causes persistent activation of voltage-gated sodium channels, continuous nerve firing, fatal muscle tremors.
Related
Informational triage only. Does not replace professional veterinary diagnosis. When in doubt, always call your vet.