Can a Human Get High Off of Catnip?

Humans cannot get high from catnip in any meaningful sense. The plant’s active compounds, called nepetalactones, trigger a euphoric-looking response in cats through a specific opioid-receptor pathway that does not produce the same effect in people. While catnip tea has a long history as a mild herbal remedy, and some people who smoke or brew the dried leaves report subtle relaxation, there is no pharmacological evidence that nepetalactone produces intoxication, euphoria, or psychoactive effects in humans. The science behind why cats go wild for the stuff actually helps explain why you won’t.

What Catnip Does to Cats and Why It Looks Like a High

Watch a cat roll around in catnip and you’d swear it was having the time of its life. Cats exposed to catnip or its close chemical relatives often rub their faces on the source, roll on their backs, drool, and generally act blissed out for five to fifteen minutes. This behavior is not just a quirky preference. Research has shown that nepetalactol, a compound closely related to nepetalactone, increases levels of beta-endorphin in cats’ blood plasma. Beta-endorphins are the body’s own feel-good chemicals, the same ones released during exercise or eating something delicious. When researchers blocked the cats’ mu-opioid receptors with a drug, the classic rubbing response was suppressed, confirming that the reaction depends on an internal opioid pathway being switched on.¹

So cats aren’t just being silly. They are experiencing a genuine neurochemical reward, driven by endorphin release in a way that mirrors mild opioid-like pleasure. That’s what makes it look like they’re getting high. The critical detail for humans, though, is that this pathway is triggered in cats by volatile plant compounds interacting with their olfactory system in a species-specific way. The compound floats into a cat’s nose, binds to receptors there, and kicks off a chain reaction that ends in endorphin release. Humans simply do not have the same olfactory wiring for nepetalactone.

Why Nepetalactone Doesn’t Affect Humans the Same Way

Nepetalactone belongs to a family of chemicals called iridoid monoterpenes. Catnip leaves are rich in several nepetalactone isomers, with cis-trans nepetalactone being the most abundant.² These compounds are effective at repelling insects and triggering feline behavior, but they lack the chemical properties needed to produce psychoactive effects in humans.

One important piece of the puzzle involves an ion channel called TRPA1. This receptor sits on sensory nerve endings and is responsible for detecting irritants. It is the reason wasabi burns your sinuses and tear gas makes your eyes sting. Researchers investigating catnip’s insect-repellent properties found that nepetalactone activates TRPA1 in mosquitoes, which is why they avoid it. But the same study showed that catnip does not activate human TRPA1.³ Unlike the active ingredient in wasabi, which hits human and insect TRPA1 alike, nepetalactone is selective. It bothers bugs without bothering us. This selectivity is part of why catnip doesn’t produce a noticeable sensory or psychoactive punch in people. The compound simply isn’t binding to the receptors that would make you feel something.

There is also the question of metabolism. Even if nepetalactone were to reach your bloodstream in meaningful quantities, your body would break it down quickly. In vitro testing using human liver microsomes showed that nepetalactone is rapidly metabolized through both oxidative and conjugative pathways, with roughly 89 percent of the compound broken down within two hours.⁴ The human liver treats nepetalactone like many other plant terpenes: it processes it efficiently and moves on. That rapid clearance makes it even less likely that the compound could accumulate enough to cross the blood-brain barrier in concentrations that would produce any intoxicating effect.

What People Actually Report When They Try Catnip

Despite the pharmacology, catnip has a long folk-medicine history. Catnip tea has been brewed for centuries as a home remedy for upset stomachs, headaches, and trouble sleeping. Some herbalists recommend it as a mild calming agent, and it’s still sold in health food stores as a dried herb for tea. People who drink it sometimes describe a gentle sense of relaxation or mild drowsiness, comparable to chamomile. Those effects, to the extent they are real, are probably unrelated to nepetalactone’s specific activity and more likely stem from the general calming ritual of drinking a warm herbal tea, plus minor sedative compounds common to many plants in the mint family.

Smoking catnip has also been tried, usually by curious teenagers or people who’ve read about it online. Reports from people who’ve smoked it range from “I felt nothing at all” to “I felt slightly relaxed for a few minutes.” No one reports hallucinations, euphoria, altered perception, or anything resembling a cannabis or psychoactive-drug high. A few people report mild headaches or nausea, which is unsurprising given that inhaling burning plant matter of any kind can irritate the lungs and trigger those symptoms. There is no controlled clinical research documenting psychoactive effects from smoking catnip in humans, and the anecdotal reports are weak, inconsistent, and easily explained by placebo or the physical effects of smoke inhalation.

The gap between what people hope catnip will do and what it actually does makes sense once you understand the cat-specific mechanism. The endorphin release that makes cats act euphoric depends on olfactory receptor pathways tuned to nepetalactone. Humans don’t have those pathways, so breathing in or consuming the compound simply doesn’t flip the same neurochemical switches.

Not All Cats Respond Either

Here is something that surprises many cat owners: the catnip response is not universal even among cats. Roughly a third of domestic cats show no interest in catnip whatsoever. The sensitivity appears to be inherited, and kittens under about six months old typically don’t respond regardless of their genetic makeup. This variability extends to related plants as well. Silver vine, valerian root, and Tatarian honeysuckle all produce similar rolling and rubbing behaviors in some cats, but through overlapping yet distinct chemical pathways involving compounds like actinidine and iridomyrmecin.²

Interestingly, most cats that don’t respond to catnip do respond to at least one of these alternatives. And the behavioral profiles aren’t identical across the different plants. Research on actinidine, a compound found in high concentrations in silver vine but barely present in catnip, found that most cats didn’t respond to it at all, but those that did responded longer and with somewhat different behaviors compared to their response to nepetalactone.⁵ The point here is that even within a species whose nervous system is specifically wired to respond to these plant compounds, the response varies enormously depending on genetics and chemistry. The idea that a different species with entirely different olfactory wiring would experience a psychoactive effect is a long shot on the face of it.

Is Catnip Safe for Humans to Consume?

Catnip tea is generally considered safe for most adults when consumed in normal amounts. It has been used as a folk remedy for centuries without reports of serious toxicity. The U.S. Food and Drug Administration has not flagged catnip as a dangerous substance, and it remains widely available as an herbal product. That said, “safe” and “a good idea” aren’t the same thing. Pregnant women are traditionally advised to avoid catnip tea because some herbalists believe it may stimulate uterine contractions, though rigorous clinical data on this is sparse. People on sedative medications should also exercise caution, since even a mildly calming herb could theoretically compound drowsiness.

Smoking catnip carries the same general risks as smoking any plant material. Combustion produces tar, carbon monoxide, and particulate matter that irritate lung tissue. There is no reason to believe smoked catnip is unusually toxic, but there’s also no benefit that would justify the irritation. If someone is smoking catnip hoping for a high, the most likely outcome is a sore throat and disappointment.

As for concentrated extracts, the rapid metabolism seen in laboratory studies suggests your liver would handle a large dose efficiently, but that doesn’t mean high-dose extracts are proven safe.⁴ Rapid metabolism means the parent compound disappears quickly, but the metabolites themselves have not been well studied for toxicity in humans. The research is still early enough that treating catnip extract as “harmless because natural” would be getting ahead of the evidence.

Catnip as a Bug Repellent

If catnip doesn’t get you high, it might at least keep the mosquitoes away. This is the area where the science on human-catnip interaction is genuinely promising. Nepetalactone isomers have been identified as potent insect repellents, and research has confirmed that catnip essential oil repels mosquitoes by activating their TRPA1 pain receptors, an effect that drives the insects away without triggering the same irritant channel in human skin.³

This selectivity is what makes catnip extracts attractive as potential bio-repellents. Traditional repellents like DEET work well but are synthetic chemicals that some consumers prefer to avoid. Catnip oil offers a plant-derived alternative. Recent research has gone further, using computational modeling to study how nepetalactone isomers interact with mosquito odorant-binding proteins, finding strong binding affinity that helps explain the repellent effect.⁶ The catch is durability: catnip oil evaporates faster than DEET, so any catnip-based repellent would need reformulation to last as long on your skin. But the underlying chemistry is sound, and it represents one of the more practical human applications for this plant.

There’s also an evolutionary angle here. The study that first tied catnip’s feline response to mosquito repellency proposed that the cats’ rubbing behavior isn’t just hedonistic. By rolling in catnip and transferring the nepetalactol to their fur, cats may be coating themselves in a natural insect repellent.¹ The endorphin reward, in this view, is evolution’s way of incentivizing a behavior that provides genuine protection against biting insects. The “high” is the mechanism, not the purpose. That framing makes it even clearer why humans don’t get the same reward: we never evolved an olfactory trigger for nepetalactone because we have other ways of dealing with mosquitoes.

Why the Myth Persists

The idea that catnip might get humans high has remarkable staying power, and a few factors keep it alive. The most obvious is the sheer drama of the feline response. When you watch a cat bliss out on catnip, it’s natural to wonder what would happen if you tried it yourself. The plant’s name even reinforces the association with intoxication: “catnip” implies something irresistible, something that overwhelms self-control. The leap from “cats love it” to “maybe humans would too” feels intuitive, even though the biology doesn’t support it.

Another factor is catnip’s membership in the mint family, Lamiaceae, which includes a number of herbs with genuine physiological effects on humans. Lavender is calming, peppermint settles the stomach, and lemon balm is mildly anxiolytic. When people learn that catnip is related to these plants, it seems plausible that it might have its own noticeable human effect. And it does, technically. A warm cup of catnip tea is mildly soothing in the same low-key way that many herbal teas are. The trouble comes when people extrapolate from “mildly soothing” to “psychoactive,” two categories separated by a wide pharmacological gulf.

Online forums and social media also play a role. A person who smokes catnip and expects to feel something may genuinely perceive mild relaxation through the placebo effect, then post about it, which becomes someone else’s evidence that catnip “works.” The feedback loop is self-sustaining because the negative reports (the majority, where people felt nothing) are less interesting and less likely to be shared. This is the same pattern that sustains myths about dozens of allegedly psychoactive plants that produce no measurable effect in controlled settings.

Other Plants in the Mint Family With Stronger Human Effects

If you’re curious about psychoactive plants, some of catnip’s relatives are genuinely interesting, though they come with caveats of their own. Salvia divinorum, a member of the same broader mint family, contains a powerful psychoactive compound called salvinorin A that activates kappa-opioid receptors in the brain. Unlike catnip, Salvia produces intense, short-lived hallucinogenic effects in humans and is regulated or banned in several countries. The fact that two plants in the same botanical family can sit at such opposite ends of the psychoactive spectrum illustrates how misleading family-level generalizations can be.

Valerian root, another plant that attracts some cats, has mild sedative effects in humans and is sold as a sleep aid. Its mechanism in people involves interaction with GABA receptors, which is completely different from the iridoid pathway that triggers cat responses. A cat rolling around in valerian and a human taking a valerian capsule before bed are having chemically distinct experiences driven by different compounds acting on different receptors. The overlap is the plant, not the pharmacology. And that distinction captures the broader lesson about catnip: sharing a botanical category with plants that affect humans does not mean every plant in that category does the same thing.