If your cat is acting spacey, wobbly, or just plain weird, there are two very different explanations: they got into catnip (harmless and temporary) or they accidentally ingested something toxic like marijuana or a human medication (potentially dangerous). The difference matters, and the signs are fairly easy to tell apart once you know what to look for.
The Catnip “High” Is Harmless
Catnip triggers a response that looks a lot like intoxication. Cats roll around, rub their faces on things, drool, zone out, and sometimes get bursts of hyperactive energy. This happens because the active compound in catnip activates the opioid reward pathway in a cat’s brain, essentially triggering a brief wave of euphoria. The whole episode lasts about 10 to 15 minutes, and the cat returns completely to normal afterward. There’s no hangover, no health risk, and no addictive potential.
Silver vine, a plant popular in cat toys, produces a similar but sometimes more intense response: salivation, licking, playful rubbing, rolling, treading with the hind legs, and eventually sleeping. About 30% of cats don’t respond to catnip at all, so if your cat has never reacted to it before, silver vine or another plant-based toy is more likely the culprit. In either case, you have nothing to worry about. Your cat is fine and probably enjoying itself.
Signs of THC Exposure
Marijuana intoxication in cats looks nothing like a catnip buzz. If your cat ate an edible, chewed on a cannabis plant, or inhaled a significant amount of secondhand smoke, the symptoms are less “playful weirdo” and more “something is wrong.” Data from the Pet Poison Helpline covering thousands of cases between 2018 and 2023 shows the most common signs are lethargy (30% of cases), loss of coordination (21%), and vomiting (15%).
Beyond those top three, THC-intoxicated cats may also show:
- Dilated pupils that don’t respond normally to light
- Urinary incontinence, or dribbling urine without seeming to notice
- Exaggerated startle responses to sounds or movement
- Trembling, twitching, or head bobbing
- Unusually slow heart rate
- Body temperature swings, either too high or too low
The key distinction is that a catnip cat looks happy and engaged. A THC-intoxicated cat looks disoriented, sluggish, and distressed. They often can’t walk straight, may stumble or fall over, and seem confused about where they are. If your cat is displaying these symptoms and there’s any chance they got into cannabis products, that’s your answer.
Human Medications Can Cause Similar Symptoms
THC isn’t the only household substance that can make a cat look “high.” Cats are curious about pills, and certain human medications are genuinely appealing to them. Cats seem to enjoy the taste of some antidepressants, and a single pill can cause serious poisoning, producing sedation, incoordination, tremors, and seizures. Some antidepressants also have a stimulant effect that dangerously elevates heart rate, blood pressure, and body temperature.
Anti-anxiety medications and sleep aids are another common culprit. These drugs, designed to calm humans, can have unpredictable effects in cats. They may cause severe lethargy, a drunken-looking walk, and slowed breathing. Certain types can even cause liver failure in cats after a single ingestion. If your cat is acting intoxicated and you can’t account for it with catnip, check your pill bottles and countertops.
How to Tell If It’s an Emergency
A cat on catnip doesn’t need any intervention. A cat that got into a toxic substance might. The signs that tip the situation from “wait and watch” to “get to a vet now” include seizures, an unsteady gait that doesn’t improve, heavy or labored breathing, repeated vomiting, drooling that won’t stop, and extreme sluggishness where the cat barely responds to you. Cornell’s Feline Health Center identifies these as hallmark signs of poisoning across many different substances.
With THC specifically, most cats recover on their own within 24 to 72 hours because the amount they typically ingest isn’t life-threatening. But “probably fine” is a gamble when you’re dealing with a small animal and an unknown dose, especially with today’s high-potency edibles and concentrates. Veterinary care is supportive, focused on keeping the cat hydrated, warm, and stable while the substance clears their system. Being honest with the vet about what your cat may have eaten makes treatment faster and more effective. Vets aren’t there to judge you.
Quick Way to Tell the Difference
Ask yourself three questions. First, is there catnip or a cat toy nearby? If yes, and the behavior looks playful rather than distressed, it’s almost certainly catnip. Second, does the episode resolve within 15 to 20 minutes? Catnip wears off quickly. THC and medication effects last hours. Third, can your cat walk normally? A catnip cat might flop around on purpose, but it can still walk a straight line when it wants to. A truly intoxicated cat stumbles and falls involuntarily.
If the behavior is new, lasted more than 30 minutes, and your cat seems genuinely impaired rather than playful, treat it as a potential poisoning. Check your home for anything they could have gotten into, and contact your vet or the ASPCA Animal Poison Control Center (888-426-4435) for guidance.