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Is Spanish Thyme toxic to cats?

YES (TOXIC)
Unfortunately, Spanish Thyme is toxic and potentially harmful to cats. We recommend you keep your feline friends away from this plant. See the table below for more information.
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Additional Names:Indian Borage, Bread and Butter Plant, Coleus, East Indian Thyme, Stinging Thyme, Country Boarage; many others
Scientific Name:Coleus ampoinicus
Family:Labiatae
Toxic Principles:Essential Oils
Clinical Signs:Vomiting, diarrhea, depression, anorexia, occasionally bloody diarrhea or vomiting
If you think your cat may have ingested a poisonous substance, call 888 426 4435 or your local vet
Detailed Write-up
Author:
Alec
Last Updated:
7/13/25

Is Spanish Thyme Toxic to Cats?

Cats are known for their curious nature and tendency to chew or nibble on plants. Owners of curious cats should be careful when selecting plants to keep in their household, as some can be poisonous to their feline companions. One plant that has recently gained attention for its potential toxicity to cats is Spanish thyme.

What is Spanish Thyme?

Spanish thyme, also known as Mexican oregano or Puerto Rican oregano, is a popular herb used in cooking, particularly in Latin American and Caribbean cuisine. This plant is native to Mexico and Central and South America and is known for its pungent aroma and flavorful leaves.

What are the Concerns with Spanish Thyme and Cats?

While Spanish thyme is a popular seasoning for human consumption, there have been concerns about its potential toxicity to cats. The reason for this concern stems from the fact that Spanish thyme contains essential oils, which can be harmful to cats in large amounts. Essential oils are highly concentrated compounds extracted from plants and contain powerful chemicals that can be toxic if ingested in large quantities.

Some of the compounds found in Spanish thyme essential oil, such as carvacrol and thymol, have been shown to have toxic effects on cats. These compounds can cause gastrointestinal upset, such as vomiting and diarrhea, and can also be damaging to the liver and kidneys if ingested in large quantities.

What are the Symptoms of Spanish Thyme Toxicity in Cats?

If a cat ingests Spanish thyme or its essential oil, there are several symptoms that may appear. These symptoms can range from mild to severe and can include the following:

  • Vomiting
  • Diarrhea
  • Loss of appetite
  • Lethargy
  • Dehydration
  • Increased thirst
  • Tremors
  • Difficulty breathing

If a cat displays any of these symptoms after ingesting Spanish thyme, it is recommended to take them to a veterinarian right away. Treatment for Spanish thyme toxicity may include supportive care, such as fluid and electrolyte therapy, and medication to manage symptoms such as vomiting and diarrhea.

What Can Owners Do to Keep their Cats Safe?

Owners of curious cats should take precautions to keep their feline friends safe from potentially toxic substances. Here are some tips to keep in mind:

  • Research plants before bringing them into the household
  • Avoid using essential oils around cats
  • Store household cleaning products and medications in secure locations
  • Keep cats away from outdoor plants and flowers
  • Supervise cats when they are in outdoor spaces or in contact with plants

By taking these steps, owners can help ensure their cats stay safe and healthy. If an owner suspects their cat has ingested something toxic, they should contact their veterinarian immediately.

Conclusion

Spanish thyme is a popular herb in many households, but cat owners should be aware of its potential toxicity to their furry companions. While not all cats will have adverse reactions to Spanish thyme, it is important to monitor their behavior and take precautions to keep them safe. As always, if a cat shows any signs of illness or toxicity, contacting a veterinarian is the best course of action.

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