Is Catnip Toxic to Cats and Dogs?
The American Society for the Prevention of Cruelty to Animals (ASPCA) lists catnip as toxic to cats. While many cats are famously attracted to this plant, ingesting it can cause adverse reactions. For dogs, the ASPCA does not have an entry for catnip, but pet owners should always exercise caution with plants.
Catnip, also known by its scientific name Nepeta cataria, is a member of the mint family, Lamiaceae. Other common names for the plant include catswort and catmint. The plant contains a compound called nepetalactone, which is responsible for its well-known effects on felines and is also listed as the toxic principle.
Catnip: what the ASPCA database lists
| ASPCA entry | Catnip |
|---|---|
| Other common names | Catswort, Catmint |
| Scientific name | Nepeta cataria |
| Family | Lamiaceae |
| Toxic to | Toxic to Cats |
| Non-toxic to | None listed |
| Toxic principles | Nepetalactone |
| Clinical signs listed | Many cats love catnip, but it can cause vomiting and diarrhea. It makes some cats sedated and others stimulated. |
What the ASPCA lists for catnip
The ASPCA plant database classifies catnip as toxic to cats. The toxic principle is identified as nepetalactone. The effects of this compound can vary significantly from one cat to another. Many cats are stimulated by exposure to catnip, while others may become sedated and calm.
Despite its popularity in cat toys and treats, the ASPCA notes that ingestion can lead to negative clinical signs. The most common issues are gastrointestinal, including vomiting and diarrhea. The ASPCA does not provide a listing for catnip’s effects on dogs.
What this means in a home with pets
The toxic designation for catnip can be confusing for pet owners who see it widely available for feline enrichment. The term “toxic” in this context refers to the substance’s ability to cause harmful effects. For catnip, these effects are related to the digestive system, such as vomiting or diarrhea, especially if a cat eats a large quantity of the fresh or dried plant.
Because many cats are drawn to catnip, they might be tempted to eat more than a small amount if they have free access to it. It is always a good practice to supervise your cat during playtime with toys containing catnip or when around the plant itself. For dogs, while catnip is not listed as toxic by the ASPCA, it is not part of their natural diet. A curious dog that chews on or eats the plant could also experience an upset stomach.
Keeping cats, dogs, and this plant apart
Managing pet access to catnip is key to preventing unwanted reactions. If you grow Nepeta cataria in your home or garden, consider placing it in an area your pets cannot easily reach. This could mean using hanging baskets, placing pots on high shelves, or using pet-safe fencing outdoors.
When offering catnip to your cat, provide only a small amount. Store dried catnip and catnip-filled toys in a sealed, inaccessible container when not in use. This prevents your cat from consuming too much at once. Always supervise your pet with any new plant, toy, or treat. If you have both cats and dogs, be aware that a dog might show interest in a cat’s toys or the plant itself, so keeping them separate is a sensible precaution.
When to call your vet
If your pet chewed or ate part of this plant, call your veterinarian or an animal poison control line. Note which plant and which part, how much may be gone and when, and take a photo or a piece of the plant with you.
If your cat or dog ingests catnip and you observe signs like vomiting, diarrhea, or unusual behavior, it is best to contact a veterinarian. Be prepared to tell them what your pet ate, how much, and when it happened. You can also call the ASPCA Animal Poison Control Center for guidance.
Emergency signs: go now
- Collapse, fainting or severe weakness
- Seizures, tremors or trouble standing
- Trouble breathing or blue, gray or very pale gums
- Repeated vomiting or retching, or a swollen, painful belly
- Any known contact with a substance listed as toxic, even before signs appear
Book an appointment soon
- Vomiting or diarrhea that lasts or keeps coming back
- Not eating or drinking, or drinking much more than usual
- Drooling, pawing at the mouth or a swollen face
- Lethargy, hiding or acting unlike themselves
ASPCA Animal Poison Control Center: (888) 426-4435 (a consultation fee may apply). Your own vet or nearest emergency clinic is always a good first call.
Sources
Last checked October 21, 2026. Listings and guidance can change; your veterinarian knows your pet’s health history.