Flea and Tick Spot-On and Pets
Find out if Flea and Tick Spot-On is toxic to dogs and cats.
Think your pet ate something toxic?
Call ASPCA Animal Poison Control Center: (888) 426-4435 or view emergency guide
Flea and Tick Spot-On Products
Spot-on flea and tick treatments are applied directly to a pet’s skin and are common in many households. When used correctly, dog-formulated products can be safe for dogs. However, mistakes are common and can be dangerous.
The most serious risk involves dog products used on cats, especially those containing permethrin or other pyrethroids. Cats lack the enzymes to break down these chemicals efficiently, so exposure through direct application or by grooming a recently treated dog can cause tremors, seizures, hypersalivation, vomiting, and death. Even a small amount can be fatal.
Always use the species-appropriate product at the labeled dose. Separate treated pets until the product is dry, and never split a large-dog dose between smaller pets. If a cat is exposed to a dog spot-on, bathe with liquid dish soap and lukewarm water, then seek emergency veterinary care immediately.
Is Flea and Tick Spot-On Toxic to Dogs?
Safe when the correct canine product is used at the labeled dose; toxicity can occur from overdosing, ingestion before drying, or using a cat-only product incorrectly.
Is Flea and Tick Spot-On Toxic to Cats?
Dog-formulated spot-ons, especially those containing permethrin/pyrethroids, can be fatal to cats. Cats can also be poisoned by grooming a recently treated dog.
Active Ingredients
- permethrin
- fipronil
- imidacloprid
- selamectin
- pyriproxyfen
- (S)-methoprene
Pest Targeted
- fleas
- ticks
- mites
Formulation
topical liquid / spot-on solution
Signal Word
caution
Application Area
skin between the shoulder blades or along the back
EPA Registration Number
EPA Reg. No. varies by product
Symptoms to Watch For
- hypersalivation
- vomiting
- diarrhea
- muscle tremors
- seizures
- lethargy
- weakness
- ataxia
- skin irritation
- respiratory distress
What If My Pet Was Exposed to Flea and Tick Spot-On?
Bathe the pet in liquid dish soap and lukewarm water to remove the product, then contact your veterinarian or a pet poison control center immediately. Bring the product label with you.
Sources
Vet's Note
PetPilot provides general information for educational purposes. While we reference authoritative veterinary organizations, this page has not been individually reviewed by a veterinarian for your specific pet. Individual animals may react differently based on age, weight, breed, health conditions, and amount consumed. Always consult your veterinarian or a poison control center for personalized advice, especially if your pet is ill, injured, pregnant, nursing, or on medication.