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LETHAL to cats — safe for dogs but NEVER cats

Is Permethrin (Flea Treatment) Toxic to Cats?

Permethrin is a common ingredient in DOG flea treatments that is extremely toxic to cats. It is the #1 cause of feline poisoning from flea products. Even residue from a treated dog can poison a cat that grooms it.

Quick Answer

Yes, permethrin (flea treatment) is toxic to cats. LETHAL to cats — safe for dogs but NEVER cats. Permethrin is a common ingredient in DOG flea treatments that is extremely toxic to cats. It is the #1 cause of feline poisoning from flea products. Even residue from a treated dog can poison a cat that grooms it. Watch for symptoms like muscle tremors and twitching and seizures.

Emergency

If your cat was exposed, contact your vet or ASPCA Poison Control (888) 426-4435 immediately.

🐱 Specifically for Cats

Permethrin is one of the top killers of cats. Cats lack the liver enzyme to process it. NEVER apply dog flea products to cats.

Symptoms to Watch For

  • Muscle tremors and twitching
  • Seizures
  • Hypersalivation
  • Difficulty breathing
  • Death without treatment

Timeline

Symptoms typically appear within 1-12 hours of exposure.

Treatment

  • EMERGENCY VET immediately for cats
  • Wash off any product with warm water and dish soap
  • Anti-seizure medication
  • IV fluids and supportive care
  • Muscle relaxants (methocarbamol)

Prevention

  • NEVER use dog flea products on cats
  • Check ALL flea product labels for permethrin
  • Separate treated dogs from cats until product is dry
  • Use only cat-specific flea treatments

Other Toxins Dangerous to Cats

🌸 Lilies🌴 Sago Palm🌷 Tulips🌺 Azaleas & Rhododendrons🌿 Oleander🪴 Aloe Vera🎄 Poinsettia🪴 Dieffenbachia (Dumb Cane)🌿 Pothos (Devil's Ivy)🪴 Snake Plant (Sansevieria)🧪 Antifreeze (Ethylene Glycol)🐀 Rat & Mouse Poison (Rodenticides)🧴 Bleach & Household Cleaners🐛 Permethrin (Flea Treatment)💊 Ibuprofen (Advil, Motrin)💊 Acetaminophen (Tylenol)💊 Antidepressants (SSRIs, SNRIs)🫧 Tea Tree Oil (Melaleuca)🫧 Essential Oils (General)🫧 Eucalyptus Oil🧺 Laundry Detergent Pods🔋 Batteries🪙 Pennies & Zinc Objects🍳 Teflon / Non-Stick Cookware Fumes🐌 Slug & Snail Bait (Metaldehyde)🌱 Lawn Fertilizer🍃 Marijuana / Cannabis / THC⚪ Mothballs🍇 Grapes, Raisins & Currants
🐕 Dogs version →🐰 Rabbits version →🐦 Birds version →🐹 Hamsters version →

Frequently Asked Questions

Is permethrin (flea treatment) toxic to cats?▼
LETHAL to cats — safe for dogs but NEVER cats. Permethrin is a common ingredient in DOG flea treatments that is extremely toxic to cats. It is the #1 cause of feline poisoning from flea products. Even residue from a treated dog can poison a cat that grooms it.
What happens if my cat is exposed to permethrin (flea treatment)?▼
Symptoms include: Muscle tremors and twitching; Seizures; Hypersalivation. Symptoms typically appear within 1-12 hours of exposure.
What should I do if my cat ingested permethrin (flea treatment)?▼
EMERGENCY VET immediately for cats. Wash off any product with warm water and dish soap. Anti-seizure medication.
How can I protect my cat from permethrin (flea treatment)?▼
NEVER use dog flea products on cats. Check ALL flea product labels for permethrin. Separate treated dogs from cats until product is dry. Use only cat-specific flea treatments.

Related Pet Safety Topics

🩺 Cats Symptom Checker🍎 Safe & Toxic Foods for Cats🚨 Pet First Aid Guide🐾 Cats Behavior Guide

This is for informational purposes only. In any poisoning emergency, contact your veterinarian or ASPCA Animal Poison Control (888-426-4435) immediately.