Why is caffeine dangerous for pets?
Caffeine is a methylxanthine (like the theobromine in chocolate) that pets metabolise slowly. It causes hyperactivity, a racing heart and tremors; at high doses it can trigger seizures or cardiac arrhythmia.
Dogs are commonly poisoned by leftover coffee, coffee grounds, or chocolate-covered coffee beans; cats by tea or energy drinks. Grounds and beans are much more concentrated than brewed drinks.
Reference bands: <1–2 mg/kg usually no signs · ~10 mg/kg can cause restlessness · 30–70 mg/kg more severe · >70 mg/kg risks seizures and arrhythmia. Ground coffee is roughly 3x stronger than brewed by weight.
Symptoms of caffeine poisoning
- Restlessness, hyperactivity, panting
- Vomiting, increased thirst and urination
- Racing heart, high temperature, tremors
- Severe: seizures, collapse, abnormal heart rhythm
What to do right now
- Call your vet if the estimated dose is meaningful or any sign appears.
- Do not induce vomiting without instruction.
- Keep them calm and cool, offer water.
- Save packaging (coffee bag, can, bottle) for exact caffeine content.
Sources & further reading
- ASPCA Animal Poison Control — pet poison database & dosage references
- Pet Poison Helpline — toxicology triage guidelines
- Merck Veterinary Manual — toxicology monographs
- Vets Now (UK) — emergency toxicosis guidance
Other poisonings with overlapping signs
- Antidepressant (SSRI) Poisoning — shares signs: restlessness, vomiting
- Marijuana / THC Poisoning in Dogs — shares signs: vomiting, severe
- Thyroid Medicines (Levothyroxine) — shares signs: restlessness, vomiting
Owners also ask
- My dog just ate one of my antidepressant pills (SSRI like Prozac) — what do I do?
- My dog ate a weed edible (THC) — what should I watch for?
Frequently asked questions
Is Caffeine Toxicity Calculator poisonous to a dog or cat?
Caffeine is a methylxanthine (like the theobromine in chocolate) that pets metabolise slowly. It causes hyperactivity, a racing heart and tremors; at high doses it can trigger seizures or cardiac arrhythmia.
What are the symptoms of caffeine poisoning?
Restlessness, hyperactivity, panting; Vomiting, increased thirst and urination; Racing heart, high temperature, tremors; Severe: seizures, collapse, abnormal heart rhythm
What should I do if my pet ate Caffeine Toxicity Calculator?
Call your vet if the estimated dose is meaningful or any sign appears. Do not induce vomiting without instruction. Keep them calm and cool, offer water.
How much Caffeine Toxicity Calculator is dangerous?
Reference bands: 70 mg/kg risks seizures and arrhythmia. Ground coffee is roughly 3x stronger than brewed by weight.
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