Benzocaine and Pets
Find out if Benzocaine is toxic to dogs and cats.
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Benzocaine is dangerous to both dogs and cats. Found in popular over-the-counter products such as Orajel, Anbesol, and some throat lozenges and sunburn sprays, benzocaine is a local anesthetic that can rapidly cause methemoglobinemia in pets. This condition prevents red blood cells from carrying oxygen effectively, leading to blue or brown gums, weakness, trouble breathing, seizures, and even death. Cats are particularly sensitive and can become critically ill after licking only a small amount.
Exposure usually happens when a pet licks benzocaine gel or spray from a person's skin, licks their own fur after a product was applied nearby, or chews a tube or bottle. Because benzocaine is rapidly absorbed through mucous membranes, symptoms can appear quickly. Any human topical anesthetic product should be kept well out of reach of pets.
Never use benzocaine products on your pet's gums, skin, or wounds without direct veterinary guidance. If your pet may have been exposed, contact a veterinarian or poison control center immediately and seek emergency care. For pain relief, always use a veterinary-prescribed medication rather than a human numbing product.
Is Benzocaine Toxic to Dogs?
Benzocaine can cause methemoglobinemia and systemic local-anesthetic toxicity if licked or ingested. Even small amounts absorbed through mucous membranes may be dangerous.
Is Benzocaine Toxic to Cats?
Cats are especially vulnerable to benzocaine-induced methemoglobinemia. Licking a small amount can cause rapid oxygen deprivation and life-threatening toxicity.
Active Ingredients
- benzocaine
Common Brand Names
- Orajel
- Anbesol
- Hurricaine
- Cepacol
- Benz-O-Sthetic
Dosage Form
gelliquidspraylozengeointment
Common Uses
- toothache and teething pain relief
- mouth sore relief
- sunburn and minor skin irritation
- hemorrhoid ointments
- throat lozenges
Toxic Ingredients
- benzocaine
Symptoms to Watch For
- pale, gray, or blue gums (cyanosis)
- difficulty breathing or rapid breathing
- lethargy or weakness
- vomiting or drooling
- rapid heart rate
- seizures or tremors
- collapse
- dark or chocolate-colored blood
What If My Pet Was Exposed to Benzocaine?
Contact your veterinarian or a pet poison control center immediately. Do not induce vomiting. If benzocaine was applied to the skin or mouth, gently wipe away residue and rinse with water. Go to an emergency veterinary clinic right away, especially if any breathing difficulty or discoloration of gums is noticed.
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.