Suspect poisoning? US: ASPCA Poison Control (888) 426-4435 · UK: 01202 509 000 · Severe symptoms → nearest emergency vet now.

My 8 kg terrier licked a flea collar and is now shaking — where else do organophosphates hide in dog products?

Dogs · Emergency guide

Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual

Short answer

Organophosphates are a serious emergency. Call your vet or the ASPCA poison line at 888-426-4435 right now. Besides some older flea collars, these pesticides can be in certain lawn sprays, garden granules, and even non-food grain baits used for pest control. The toxin works fast, so don't wait for more signs. If the collar is still on, remove it and wash the contact area with mild soap and water. Tell your vet exactly what product your dog encountered — the name on the package matters for choosing the right antidote.

Why Organophosphates Are Hazardous

Organophosphates inhibit acetylcholinesterase, causing an overload of acetylcholine at nerve synapses. This leads to uncontrolled stimulation of muscles, glands and the heart.

The toxicity can appear within minutes after ingestion or skin contact, making prompt action essential.

Why speed matters

Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.

Signs to watch for

  • Profuse drooling
  • Excessive tearing
  • Urination and defecation
  • Vomiting and diarrhea
  • Muscle tremors or weakness
  • Seizures or respiratory distress

What to do right now

  1. Call your vet or a pet poison helpline right away
  2. Do NOT induce vomiting because the toxin can be absorbed rapidly
  3. Remove any contaminated fur and wash the skin with mild soap and water
  4. If the pet is conscious, give small amounts of water to help dilute the toxin
  5. Transport the animal to an emergency veterinary clinic for antidote therapy and monitoring
If your pet shows any of the signs above, go to the nearest emergency vet now and call ahead.

The step-by-step response, from the first minute to the vet visit, is in our Organophosphate Pesticide Poisoning in Dogs and Cats emergency guide.

Open the full emergency guide: Organophosphate Pesticide Poisoning in Dogs and Cats →