Key takeaways:
Catnip contains an oil called nepetalactone that activates the parts of a cat's brain associated with scent, mood, and behavioral regulation.
Catnip can put cats in a good mood, but it also provides enrichment, reduces stress, and repels bugs. It can also help address unwanted behaviors.
Cats typically stop reacting to catnip after 5 to 30 minutes. They also become desensitized to it over time, so it's best to spread out catnip use to only a couple of times a week.
If you've ever seen a cat go wild after rolling around in some catnip, you may have wondered, "What does catnip do to cats?"
Catnip is a member of the mint family. It's abundant in an oil called nepetalactone, which triggers a reaction in cats when the molecules bind to receptors in their noses. This activates parts of their brains that are associated with scent, mood, and behavioral regulation.
Not all cats respond to catnip. But for the ones who do, the responses can vary. Some cats get more relaxed, happy, playful, and affectionate, while others become overstimulated and aggressive or agitated.
Here, we’ll break down how catnip might affect your cat, how much to give them, and other things you can try if your cat is immune to catnip.
Let’s take a closer look at how (and why) catnip affects many cats.
Regardless of your cat's individual reaction to catnip, you can count on some funny antics.
Catnip puts many cats in a good mood. As such, they'll exhibit a lot of behaviors associated with being in a good mood. They’ll often purr, roll around, and become more playful, for instance.
“This can be helpful when introducing them to a new home or if you’re encouraging them to play more," Joey Lusvardi, CCBC, a certified cat behavior consultant and the founder of Class Act Cats, told GoodRx Health.
Your cat may also get a burst of energy or run around the house doing zoomies. If they get overstimulated, they may be quick to swat at you or whip their tails back and forth. If you see these behaviors, you might want to back off for a few minutes until they calm down.
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Catnip and catnip-induced behavior aren’t just amusing. Catnip can be a source of enrichment, or a form of mental and physical stimulation that allows cats to express their natural instincts.
Enrichment is important for all cats, but even more so for indoor cats because they don't get to express these instincts as often. This makes them prone to boredom and more likely to exhibit negative behaviors like:
Catnip can provide cats with an outlet and keep them entertained.
Catnip is also believed to reduce stress and anxiety in cats by acting on the limbic system — the part of the brain that controls emotions and behaviors. In one study, catnip prompted shelter cats to sleep more and spend less time standing and exploring their environment. While the researchers didn't connect this to decreases in stress, it suggests some sort of relaxation response.
Catnip has also been shown to act similarly to serotonin, which improves mood and overall well-being in cats. However, there's been no scientific studies on exactly how catnip works in this regard.
The chemical nepetalactone in catnip that causes a response in cats also helps keep pests, in particular mosquitos, away. This may explain why cats react to catnip in certain ways, according to Lusvardi.
"Cats who roll around, for example, will be covered in a potent insect repellant and be less likely to catch mosquito-borne illnesses," he said.
While you can't train cats as effectively as dogs, catnip can help guide them in the direction you want. For example, you can use catnip to draw cats to a particular location (or away from one).
Lusvardi pointed out that this is helpful when trying to get cats to go into their carriers or scratch on a scratching post instead of the couch. You can also use catnip to encourage picky eaters to try new foods.
According to Lusvardi, there’s no need to be stingy with catnip. But the more frequently you give it to a cat, the less strong their response will be. Because of this, a good rule of thumb is to limit catnip to no more than once per day. But spacing it out a bit more, like to a couple times per week, may give your cat a stronger response.
"Cats will respond to catnip for 5 to 30 minutes and then have a refractory period where they don’t respond at all. That period of time is different for each cat, but it usually lasts at least an hour," Lusvardi said.
As for how much catnip to give cats? There's no recommended dosage, but Lusvardi said a generous pinch is usually enough. If the catnip is old or your cat doesn’t have a strong response, you may need to give them a bit more.
Since fresh catnip is stronger than dried catnip, you don’t need as much to get a similar response. And powdered catnip is extra concentrated, so you only need a small amount to get your cat going.
Kittens can have catnip, but kittens younger than 6 to 8 weeks old don't really respond to it. So while it’s not unsafe to give catnip to young kittens, there's no benefit either. It's best to wait until kittens are at least 8 weeks old to introduce them to catnip.
Unless they're allergic, cats can safely eat catnip. In fact, there are catnip-flavored treats you can give to your cat.
That said, cats don't have the same response to eating catnip as they do to sniffing it. Cats react to catnip because the active chemical binds to receptors in their nose, Lusvardi pointed out. So while it won't cause any harm, eating catnip doesn’t have a real benefit.
Cats can't overdose on catnip in the same way that humans can overdose with medications and other substances. In other words, too much catnip isn’t fatal to cats. But Courtney Deer, DVM, an emergency and critical care veterinarian, told GoodRx Health that large doses can contribute to diarrhea, digestive upset, and dizziness.
Large amounts have also been known to trigger seizures in cats. So it's best to avoid giving catnip to cats with a history of seizures.
Cats can’t really get addicted to catnip. According to Lusvardi, we don’t see that type of behavior with cats in general.
"While your cat will absolutely perk up and head right over to the catnip when you bust it out, they don’t actively seek out catnip in the same way a person might seek out an addictive substance," he said.
Only about 50% to 75% of cats react to catnip. The rest don't have a sensitivity and won’t show a response to it. If your cat isn't reactive to catnip, or you just want to switch it up, there are some catnip alternatives you can try. The following plants have similar effects on cats as catnip.
Part of the kiwi family, silver vine is the most effective "catnip dupe," with about 80% of cats reacting to it, according to Deer. And like catnip, it's best smelled instead of eaten. The effects of silver vine — sedation, rolling around, and licking — tend to last up to 30 minutes.
Tatarian honeysuckle affects about 50% of cats and has similar effects to catnip. The wood is the most commonly used part, since some honeysuckle berries, flowers, and leaves can be toxic to cats. Though, Deer warned, some cats may chew on the wood, which can be a choking hazard. So if you do give it to your cat, monitor them closely.
About 50% of cats are sensitive to valerian root, which has similar effects to catnip. It can be given to cats orally or inhaled. But Deer said to use extra care and find a product that's made especially for cats, since human-grade products can have garlic in them. And garlic is toxic to cats.
Catnip can provide enrichment and stress relief for your cat. It can also be a source of entertainment, since it's fun to watch them go wild over it.
While not all cats respond to catnip, there's no harm in giving it to them to see how they react. It's not addictive and is unlikely to cause any health issues. If your cat doesn't respond to catnip, you can try a catnip alternative like silver vine, tatarian honeysuckle, or valerian root.
American Society for the Prevention of Cruelty to Animals (n.d.). Garlic.
Bales, L. (2021). What makes a cat a healthy pet? DVM360.
Bol, S., et al. (2017). Responsiveness of cats (Felidae) to silver vine (Actinidia polygama), Tatarian honeysuckle (Lonicera tatarica), valerian (Valeriana officinalis) and catnip (Nepeta cataria). BMC Veterinary Research.
Brooks, W. (2022). Safe gardening for cats and dogs. Veterinary Partner.
Da Silva, R. P., et al. (2019). Stress and anxiety in domestic cats: Pharmacological and ethnoveterinary treatment - A review. Science and Animal Health.
Ellis, S. L. H., et al. (2010). The influence of olfactory stimulation on the behaviour of cats housed in a rescue shelter. Applied Animal Behaviour Science.
Foreman-Worsley, R., et al. (2021). Indoors or outdoors? An international exploration of owner demographics and decision making associated with lifestyle of pet cats. Animals.
Garcia, J. L. (2021). Olfactory enrichment for cats: Alternatives to catnip. DVM360.
Hart, B. L. (2009). Why do pets do that? Eating grass, purring, yawning and catnip reactions (Proceedings). DVM360.
Landsberg, G. M., et al. (2014). Behavioral problems of cats. Merck Veterinary Manual.
Nappier, M., et al. (2019). Journal scan: What's the power behind catnip? DVM360.
Scandurra, A., et al. (2023). Home sweet home: The impact of lifestyle on a cat’s approach to impossible tasks in the home environment. Animals.
Uenoyama, R., et al. (2021). The characteristic response of domestic cats to plant iridoids allows them to gain chemical defense against mosquitoes. Science Advances.