Why is it dangerous to pets?
Foxglove (Digitalis purpurea) contains digitoxin and digoxin, the same drugs used in human heart medicine — but in uncontrolled amounts. They slow conduction through the heart and can cause heart block, arrhythmias and cardiac arrest.
Leaves are most toxic and remain dangerous when dried or wilted, including in floral arrangements and compost.
Why speed matters
Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.
Symptoms of foxglove poisoning
- Vomiting, drooling, loss of appetite
- Slow, weak or irregular heartbeat
- Wobbliness, collapse, fainting
- Dilated pupils, blurred vision behaviour (bumping into things)
- Seizures and sudden death in severe cases
What to do right now
- This is an emergency even if the pet looks normal — call and go now.
- Bring plant material so the vet can confirm it is foxglove and not a look-alike.
- Never induce vomiting at home for a suspected cardiac toxin.
- Tell the vet about any heart medication the pet already takes.
If your pet shows any of the signs above, go to the nearest emergency vet now and call ahead.
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