Can Catnip Make a Cat Sick
Medically Reviewed by Dr. Marcus Thorne, BVSc, Veterinary Behaviorist
Catnip is one of the most well-known and widely used herbs for cats. Many cat owners keep dried catnip, catnip toys, or catnip spray at home for their feline friends. But as a responsible pet owner, you might wonder: can catnip actually make my cat sick? Understanding how catnip affects cats helps you use it safely and responsibly.
What Is Catnip
Catnip, scientifically known as Nepeta cataria, is a plant from the mint family. It contains a compound called nepetalactone, which is the source of the typical catnip reaction. This herb is native to Europe and Asia but is now grown worldwide.
When cats smell catnip, the nepetalactone binds to receptors in their noses, triggering a response in the brain that causes the characteristic behaviors many owners recognize: rolling, rubbing, meowing, and playful hyperactivity.
How Cats React to Catnip
Not all cats respond to catnip. Sensitivity to catnip is genetic, and approximately 50-75% of cats show some reaction to it. Kittens under six months old typically do not respond, as the sensitivity develops as they mature.
Common reactions to catnip include:
- Rolling on the ground
- Rubbing against objects or people
- Increased vocalization
- Playful leaping and running
- Heightened energy followed by calmness
- Stretching and kneading
These reactions typically last 5-15 minutes, after which the cat loses interest and may not respond again for an hour or two.
Is Catnip Safe for Cats?
In general, catnip is considered safe for cats. It is not toxic or poisonous, and the compound that causes the reaction is not addictive. Cats cannot overdose on catnip in the way that humans might overdose on substances, and there are no known long-term negative effects from catnip exposure.
When cats eat catnip rather than smell it, the effects are often different—many cats become calm and sleepy rather than hyperactive. This is because the compound affects cats differently depending on whether it enters through the nose or the digestive system.
Can Cats Have Too Much Catnip
While catnip is safe, moderation is important:
Digestive upset: If a cat eats a large amount of catnip, they might experience mild digestive upset, including nausea or diarrhea. This is temporary and usually resolves on its own.
Excessive excitement: Some cats may become overly excited or agitated when exposed to catnip, which could lead to rough play or unwanted behaviors.
Loss of effectiveness: If catnip is used too frequently, cats may become less responsive to its effects over time.
Behavioral changes: Very rarely, some cats may show aggressive behavior when exposed to catnip, though this is uncommon.
Catnip Products: What to Watch For
Not all catnip products are created equal, and some may pose additional risks:
Fresh catnip: Fresh leaves and stems from your own garden or purchased fresh are generally the safest option, as they contain no additives.
Dried catnip: Store-bought dried catnip is safe as long as it comes from a reputable source. Avoid products with added chemicals, pesticides, or other ingredients.
Catnip toys: Check toys for small parts that could be chewed off and swallowed. Supervise your cat with new toys until you know how they interact with them.
Catnip spray: sprays are generally safe, but read ingredients to ensure no harmful additives are present.
Catnip filled with other ingredients: Some commercial products may include fillers, dried fruits, or other ingredients that are not suitable for cats. Always check the ingredient list.
Signs That Your Cat May Have Had Too Much Catnip
Watch for these signs if your cat has been exposed to catnip:
- Vomiting
- Diarrhea
- Excessive drooling
- Unusual lethargy or hyperactivity
- Difficulty walking or coordination problems
- Signs of distress or agitation
If these symptoms persist or seem severe, contact your veterinarian for guidance.
Using Catnip Responsibly
To use catnip safely:
- Offer catnip in moderation, perhaps once a week or less
- Provide fresh catnip in small amounts rather than unlimited access
- Observe your cat’s reaction when trying catnip for the first time
- Store catnip in a secure container to prevent your cat from eating large quantities
- Choose high-quality, organic catnip from trusted sources when possible
- Supervise play with catnip toys to prevent chewing on non-edible parts
Alternatives to Catnip
If your cat doesn’t respond to catnip or you want variety, consider these alternatives:
Silver vine: This plant elicits a response in many cats who don’t respond to catnip. It contains compounds different from nepetalactone.
Tatarian honeysuckle: The wood of this plant can produce reactions similar to catnip in some cats.
Valerian root: Some cats respond to valerian, though the smell is often unpleasant to humans.
Cat thyme: Another herb that some cats enjoy, though less commonly available.
Kittens and Catnip
Young kittens typically don’t respond to catnip. Most cats develop sensitivity between 3-6 months of age. If you have a kitten, wait until they are older before introducing catnip.
Senior Cats and Catnip
Older cats can enjoy catnip, but some may have reduced sensitivity. Additionally, very excited play behavior might not be appropriate for cats with arthritis or mobility issues. Consider using catnip to encourage gentle activity rather than intense play in senior cats.
Note: If your cat shows any unusual symptoms after exposure to catnip or any other substance, please contact your veterinarian. While catnip is generally safe, every cat is different, and your vet can provide guidance based on your individual pet’s health and circumstances. When in doubt, professional veterinary advice is always the best course of action.