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Is Marjoram toxic to cats?

YES (TOXIC)
Unfortunately, Marjoram 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:Knotted Marjoram, Pot Marjoram
Scientific Name:Origanum majorana
Family:Lamiaceae
Toxic Principles:Gastrointestinal irritants
Clinical Signs:Vomiting and diarrhea
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 Marjoram Toxic to Cats?

Cats are curious creatures, and they often find themselves exploring their surroundings. As a result, it's important for pet owners to be aware of any potentially harmful substances that their feline companions may come in contact with. Marjoram is one such substance that some cat owners may wonder about. While marjoram is a commonly used herb in cooking and has been used in traditional medicine for its therapeutic properties, there are concerns about whether it's toxic to cats.

What is Marjoram?

Marjoram is an herb that belongs to the mint family, Lamiaceae. It's native to the Mediterranean region and is commonly used in cooking, particularly in Mediterranean and Middle Eastern cuisine. Marjoram has a slightly sweet and floral taste and is often used to flavor meat dishes, sauces, and dressings. It's also used as a natural remedy for several health conditions, including stomach issues, anxiety, and insomnia.

Is Marjoram Toxic to Cats?

There's no straightforward answer to whether marjoram is toxic to cats. While marjoram is generally considered safe for humans to consume, there's limited research on its effects on cats. Some cat owners have reported that their feline companions have experienced adverse reactions to marjoram, while others have not observed any negative effects.

The ASPCA Animal Poison Control Center classifies marjoram as a herb that is safe for cats to ingest. However, they note that cats may experience digestive problems, such as vomiting and diarrhea, if they consume large amounts of marjoram. In addition, some sources suggest that marjoram may have mild sedative effects on cats, which could cause them to feel drowsy or lethargic after ingestion.

What are the Possible Side Effects of Marjoram in Cats?

While there's limited research on the effects of marjoram in cats, some cat owners have reported the following symptoms after their feline companions ingested the herb:

  • Vomiting - Ingesting marjoram may cause cats to throw up.
  • Diarrhea - Cats may experience diarrhea after consuming marjoram.
  • Lethargy - Some cats may become sleepy or sluggish after ingesting marjoram due to its mild sedative properties.

What Should You Do if Your Cat Ingests Marjoram?

If you suspect that your cat has ingested marjoram, it's important to monitor them for any adverse side effects. In most cases, cats will recover on their own after consuming small amounts of marjoram. However, if your cat exhibits any of the following symptoms, you should contact a veterinarian right away:

  • Severe vomiting or diarrhea that persists for more than 24 hours
  • Loss of appetite
  • Lethargy or weakness
  • Difficulty breathing

If you're concerned about the potential risks of marjoram in your home, you may want to consider keeping the herb out of your cat's reach. This can be done by storing marjoram in a closed cabinet or on a high shelf. You may also want to consider growing marjoram in a separate area of your garden if you have outdoor cats.

In Conclusion

While the research on marjoram's effects on cats is limited, it's generally considered safe for feline consumption in small doses. However, cats that consume large amounts of marjoram may experience digestive problems and lethargy. If you suspect that your cat has ingested marjoram and exhibits any concerning symptoms, contact your veterinarian right away. Finally, consider keeping marjoram out of your cat's reach if you're concerned about potential risks.

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