Is Monstera toxic to cats?
Monstera is toxic to cats (S2 Irritant): its insoluble calcium oxalate crystals cause intense oral irritation, drooling, and vomiting, but ingestion is rarely life-threatening.
- TOXINinsoluble calcium oxalates
- WHAT TO EXPECToral irritation; intense burning and irritation of mouth, tongue and lips; excessive drooling
- CALL THE VETCall your vet if drooling or vomiting persists or worsens, your cat refuses food or water, or you notice swelling of the mouth or trouble breathing.
Symptoms
| SIGN |
|---|
| oral irritation |
| intense burning and irritation of mouth, tongue and lips |
| excessive drooling |
| vomiting |
| difficulty swallowing |
If your cat just ate it
Safe swaps, graded S0
Graded S0 for cats. Same-shape matches are coming as the index grows.
Care at a glance
FAQ
Is a monstera the same risk to cats as philodendron or pothos?
Practically, yes — and that's reassuring, not alarming. All three are aroids with insoluble calcium oxalate crystals, and each is graded S2 Irritant in our index against its own ASPCA record. Mixing up which heart-leafed vine you own doesn't change what you do: expect the same mouth irritation, use the same response, and none of them carries the kidney danger of a true lily. Remove the chewed material and call your vet if signs persist.
What happens if my cat chews a monstera leaf?
The crystals bite back immediately — the ASPCA lists "intense burning and irritation of mouth, tongue and lips, excessive drooling, vomiting, difficulty swallowing." It's painful but rarely dangerous: this is contact irritation, not a systemic poison. Take the plant away, and call your vet if drooling or vomiting persists or worsens or you notice mouth swelling.
Is the "Swiss cheese plant" the same as a monstera — and what about a "split-leaf philodendron"?
Both names are this plant. Our record files Monstera deliciosa under Swiss Cheese Plant, Split-leaf Philodendron, Cutleaf Philodendron and Ceriman, and the ASPCA entry we transcribe is itself filed as "Cutleaf Philodendron" — so a plant sold to you as a philodendron here is not one. The grade is S2 Irritant on insoluble calcium oxalates, with "intense burning and irritation of mouth, tongue and lips," "excessive drooling" and "vomiting" on record. If your tag says heartleaf philodendron instead, that is a genuinely different plant with its own entry.