Why is it dangerous to pets?
Pothos, philodendron, monstera and peace lily all belong to the Araceae family and all contain insoluble calcium oxalate crystals. Chewing releases the crystals, causing burning and swelling of the mouth.
Trailing vines hang exactly at cat height, which is why these are among the most commonly reported plant exposures.
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 pothos poisoning
- Drooling, pawing at the mouth, head shaking
- Swollen lips, tongue or muzzle
- Vomiting, not eating
- Skin irritation where sap touched the fur
- Breathing difficulty if the throat swells (emergency)
What to do right now
- Rinse the mouth with water, or give milk or yoghurt to soothe it.
- Wipe sap off the fur with a damp cloth so grooming does not re-expose the mouth.
- Call the vet and go in if breathing changes.
- Hang plants where they cannot be reached — or choose pet-safe plants such as spider plant or calathea.
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