Food safety · 2 min read

Can cats eat Black tea / tea bags?

No — dangerous

No. Standard black tea contains caffeine (40–70 mg per cup — enough to affect a cat) and theobromine. A cat that drinks spilled tea or chews a used tea bag can develop significant caffeine toxicity.

If your cat has just eaten black tea / tea bags

  1. Move your cat away from the tea.
  2. Don't induce vomiting at home — this is dangerous in cats.
  3. Call your vet or out-of-hours emergency vet immediately.
  4. If you can't reach a vet, call the Animal PoisonLine on 01202 509000 — 24/7, charges apply.
  5. Note how much tea was eaten, when, and your cat's weight.

What's the full picture?

UK tea is stronger than many varieties worldwide — typical builder's tea contains 40–70 mg of caffeine per cup. Toxic dose for cats is 20–40 mg/kg, so a 4 kg cat can be affected by a few sips.

Used tea bags still contain significant caffeine. Cats will occasionally chew or play with them from a kitchen bin.

Green tea, white tea, and herbal teas vary — most herbal teas are lower-risk, but check for caffeine. Chamomile is fine in trace amounts; mint teas are caution; any tea blend containing green tea extract is a risk.

Symptoms to watch for

30–120 minutes
Restlessness, rapid heart rate, tremors, vomiting.
2–12 hours
Seizures with larger doses.

If you're worried right now

Call your vet or out-of-hours emergency vet first. For poison advice, the Animal PoisonLine (UK) is on 01202 509000 — 24/7, charges apply. Your vet can also call the Veterinary Poisons Information Service (VPIS) directly.

Caffeine (coffee, tea, energy drinks) no Coffee grounds no Energy drinks no

About this guidance

Every entry on this site is compiled from published UK veterinary toxicology sources — International Cat Care, Veterinary Poisons Information Service (VPIS) references, RCVS-registered practice materials, and peer-reviewed feline medicine literature. Where the evidence is mixed, we err on the cautious side because cats are unusually sensitive to many common substances that are harmless to humans and even to dogs.

This is general information written for UK cat owners. It is not personalised veterinary advice for your specific cat, their age, weight, medical history, or the exact exposure you're dealing with. If your cat has eaten something or is unwell, call your vet first. The Animal PoisonLine on 01202 509000 is available 24/7 for a small fee and can tell you whether an emergency visit is needed.

Entries are reviewed and updated as new research emerges. Spotted an error? Let us know — corrections are investigated and applied within 24 hours. For more context on how we work, see about and our full disclaimer.

Last reviewed: · By the What Can My Cat Eat? editorial team

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