Can cats drink coffee?
No — caffeine is toxic to cats: racing heart, tremors and cramps loom. Coffee grounds, tea, energy drinks and cocoa are dangerous too.
Which substance is dangerous?
Caffeine is a methylxanthine like theobromine and overstimulates the feline heart and nervous system. Cats metabolise it far more slowly than humans. Beyond the cup of coffee, the concentrated sources matter: coffee grounds and beans, tea bags, energy drinks, caffeine tablets and cocoa powder.
How much is dangerous?
A few laps of milk foam are usually not dramatic, but a drunk quantity of coffee, an energy drink or chewed coffee beans are acutely dangerous. Concentrated forms (grounds, tablets) can be life-threatening even in small amounts.
Symptoms of poisoning
Restlessness, racing heart, arrhythmia, tremors, vomiting, heavy panting, elevated temperature and cramps — within roughly one to two hours.
Emergency: what to do?
Caffeine ingested? Contact the vet, especially after concentrated sources such as coffee grounds, beans or energy drinks. State product and amount; take the packaging along.
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Frequently asked questions
My cat licked at my latte — dangerous?
A lick of milk foam contains little caffeine and is usually harmless — but milk itself causes digestive trouble. Keep cups out of reach anyway.
Are tea and energy drinks also toxic?
Yes. Black and green tea contain caffeine, energy drinks a lot of it. Herbal teas without caffeine are not toxic but also not necessary.
Why are coffee grounds so dangerous?
They concentrate the caffeine. A cat that chews on grounds or beans takes in multiples of a sip of coffee.
How fast do symptoms show?
Within one to two hours: restlessness, racing heart, tremors. At the first sign, off to the vet.
Important note
This article never replaces veterinary advice. If you suspect poisoning or symptoms persist, contact your vet or the emergency veterinary service immediately.
Sources: Veterinary toxicology: caffeine/methylxanthine poisoning in cats. Last updated: 08/2026.
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