←
Swiss Cheese Vine
Monstera adansonii
Swiss Cheese Vine (Monstera adansonii), named for the distinctive holes in its leaves, is toxic to cats. As a member of the Araceae family (the same as Pothos, Philodendron, and Dieffenbachia), it contains insoluble calcium oxalate crystals (raphides) throughout its leaves and stems. Chewing causes immediate intense oral pain.
Important Notes
Toxic compounds: insoluble calcium oxalate raphides; sap also contains proteolytic enzymes
Mechanism: raphides penetrate the oral mucosa mechanically when plant cells are damaged, causing burning and swelling
Symptoms: sudden oral pain, intense drooling, pawing at mouth, difficulty swallowing, swollen tongue and lips, vomiting
All Monstera species carry the same oxalate toxicity — Swiss Cheese Vine, Swiss Cheese Plant, and Split-Leaf Philodendron are all hazardous
Rinse the mouth with water; seek vet care if swallowing is impaired
Potentially Toxic Parts
Leaf
Stem
Possible Symptoms Reported in Cats
Swelling of the mouth, tongue, and throat (edema), leading to difficulty swallowing
Gastrointestinal · Immediate to shortly after exposure.
Oral burning, tissue irritation, and crying out in pain
Gastrointestinal · Immediate.
Excessive drooling (hypersalivation) and pawing at the mouth
Gastrointestinal · Immediate.
Vomiting
Gastrointestinal · Shortly after ingestion.
Anorexia or reluctance to eat
Gastrointestinal · Shortly after exposure.
Disclaimer: This summary was compiled from multiple sources and is for informational use only. It is not a diagnosis or treatment plan. Toxicity can vary based on the substance, amount, plant part, and individual cat. If you think your cat may have been exposed to a toxic substance, contact a veterinarian right away.