Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat ate Monstera - what should I do?
Monstera deliciosa
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Oral irritation, intense burning and irritation of mouth, tongue and lips, excessive drooling, vomiting, and difficulty swallowing.
Escalation note
The insoluble calcium oxalate crystals cause immediate mechanical irritation. While rarely fatal, contact a veterinarian if your cat shows signs of distress or persistent vomiting.
First aid at home
Remove any plant fragments from your cat's mouth. Rinse the mouth gently with cool water; offering a small amount of milk or plain yogurt can help bind the oxalate crystals and ease the burning. Then call ASPCA Animal Poison Control (888-426-4435) or the Pet Poison Helpline (855-764-7661). Do not induce vomiting unless a veterinarian tells you to.
What to watch for
Sudden pawing at the mouth and head-shaking; heavy drooling; foaming around the lips; vomiting (often once or twice with bits of leaf); difficulty swallowing; visible swelling of the tongue or lips. Severe cases (rare): swelling that interferes with breathing.
Time window
Onset is fast — sometimes within 30 seconds of chewing, usually within minutes. Most cats recover within 24 hours; signs may take up to 48 hours to resolve fully with supportive care.
When to call the vet
Call your vet or a pet poison hotline right away if drooling persists past an hour, your cat refuses to eat or drink, the tongue or lips are visibly swelling, or there is any change in breathing.
What this means for your cat
Cats that nibble Monstera leaves get a fast, painful surprise: the leaves are studded with insoluble calcium-oxalate crystals that act like microscopic needles in the mouth. The reaction is unpleasant but rarely dangerous — most cats stop chewing within seconds and recover within a day with supportive care.
Sources: ASPCA, Pet Poison Helpline.
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.