Is Caffeine Toxic to Cats and Dogs?
Caffeine is severely toxic to cats and dogs — it overstimulates the heart and nervous system. Coffee grounds and energy drinks are common sources. Call a vet.
Potentially life-threatening — treat any exposure as an emergency.
Potentially life-threatening — treat any exposure as an emergency.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Caffeine?
Caffeine is severely toxic to cats and dogs — it overstimulates the heart and nervous system. Coffee grounds and energy drinks are common sources. Call a vet.
Also known as: coffee, coffee grounds, energy drink, tea, espresso, caffeinated.
Symptoms to Watch For
🐕 In Dogs
- Restlessness, panting, and hyperactivity
- Rapid or irregular heart rate
- Vomiting and elevated blood pressure
- Tremors, seizures, and collapse in serious cases
🐈 In Cats
- Restlessness and agitation
- Rapid heart rate and elevated blood pressure
- Vomiting and muscle tremors
- Seizures and collapse in serious cases
What to Do If Ingested
- Note the source (coffee, energy drink, pills) and amount.
- Call a veterinarian or poison hotline immediately.
- Remove any remaining product from reach.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- Any significant caffeine was eaten or drunk
- Restlessness, panting, or a racing heart
- Vomiting or tremors
- Seizures or collapse
Frequently Asked Questions
Frequently Asked Questions
How much caffeine is dangerous?
Pets are far more sensitive to caffeine than humans. Coffee grounds, espresso, energy drinks, caffeine pills, and diet supplements are the most dangerous because they are concentrated. Call a vet with the source and amount.
Are coffee grounds dangerous to pets?
Yes. Used coffee grounds are concentrated caffeine and smell tempting to some dogs. Keep compost and used grounds out of reach, and call a vet if any are eaten.
What are the signs of caffeine poisoning?
Restlessness, panting, a racing or irregular heart, vomiting, and tremors, progressing to seizures in serious cases. Symptoms can appear within 1 to 2 hours. Do not wait — call a vet.
Sources
This entry is reviewed against the following authoritative veterinary sources.
Last reviewed: 2026-07-11