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Is Eucalyptus Toxic to Cats? Safety Verdict and What to Do

PawAI Lab
5 min read

Learn whether eucalyptus poses a toxicity risk to cats, what signs may appear after exposure, and what immediate steps to take if your cat may have been exposed.

Quick Answer

Yes, eucalyptus is toxic to cats. Plants producing toxic essential oils include eucalyptus, lavender, rosemary, thyme, sage, oregano, and lemongrass. If your cat may have been exposed, contact a veterinarian or animal poison-control service right away, even if no signs are visible yet.

Before using any tool, contact a veterinary professional if your cat may have been exposed.

  • US: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • UK: Animal PoisonLine (01202 509000) or your nearest veterinary emergency clinic
  • Canada: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • AU: Animal Emergency Centre or your regular vet
  • EU: Contact your nearest veterinary emergency service

TOXICITY CHECKER

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Safety Verdict

Toxic. Essential oils are toxic to cats because cats lack the liver enzyme glucuronyl transferase needed to metabolize them. Toxins accumulate, causing liver damage, neurological signs, and other serious effects.

Plants producing toxic essential oils include eucalyptus, lavender, rosemary, thyme, sage, oregano, and lemongrass. Concentrated oils are far more dangerous than the plants, but chewing plants can still cause toxicity.

What It Is

Eucalyptus contains essential oils including eucalyptol that are toxic to cats. Cats lack the liver enzyme needed to metabolize these compounds, causing them to accumulate and cause damage.

Why It May Be Harmful

The toxic principle in eucalyptus is essential oils (eucalyptol, linalool, thymol, and others). Essential oils are toxic to cats because cats lack the liver enzyme glucuronyl transferase needed to metabolize them. Toxins accumulate, causing liver damage, neurological signs, and other serious effects.

Signs of toxicity may include:

  • Drooling
  • Vomiting
  • Diarrhea
  • Lethargy
  • Loss of coordination
  • Tremors
  • Liver damage
  • Seizures in severe cases

Timeline: Signs may develop within a few hours of ingestion or contact.

Can be serious. May cause liver damage and neurological effects.

What to Do If Your Cat Eats It

  1. Contact a veterinarian or animal poison-control service immediately.
  2. Remove any remaining substance from your cat's reach.
  3. Do not induce vomiting unless instructed by a veterinarian.
  4. Do not give food, milk, charcoal, or home remedies.
  5. Bring the substance, plant, or packaging for identification.

Information to have ready when you call:

  • Your cat's age, approximate weight, and any health conditions
  • The name or type of eucalyptus and the estimated amount consumed
  • When the exposure likely occurred
  • Any current symptoms your cat is showing
  • The product packaging or a photo of the plant if applicable

If only a small amount of leaf was chewed with no signs, monitoring may be appropriate. Any exposure to concentrated essential oils should be treated seriously.

When to Contact a Veterinarian

Contact a veterinarian or animal poison-control service immediately if your cat may have been exposed to eucalyptus. Do not wait for symptoms to develop.

Emergency signs that require urgent veterinary attention:

  • Tremors or seizures
  • Severe lethargy
  • Persistent vomiting
  • Yellowing of skin or eyes
  • Difficulty breathing

Non-urgent follow-up: If only a small amount of leaf was chewed with no signs, monitoring may be appropriate. Any exposure to concentrated essential oils should be treated seriously.

FAQ

Are essential oils from plants dangerous to cats?

Yes. Cats lack the liver enzyme to metabolize many essential oil compounds. Both plants and concentrated oils are potentially dangerous.

Is lavender safe for cats?

Lavender plants and essential oil are toxic to cats. Chewing the plant causes GI signs and lethargy. Keep lavender away from cats.

Can I use essential oil diffusers around my cat?

Diffusers can expose cats to toxic compounds. Consult a veterinarian before using essential oil products in a home with cats.

TOXICITY CHECKER

Concerned about another plant, food, medication, or household item around your cat? Get general, species-aware safety information to help you decide your next step.

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This tool provides general safety information and does not replace veterinary advice.

Sources

Disclaimer

This article and the PawAI Toxicity Checker tool provide general safety information and do not replace examination, diagnosis, or treatment by a licensed veterinarian. If your cat may have ingested a toxic substance, contact a veterinarian, emergency clinic, or animal poison control immediately.