Monstera plants are toxic to cats. They contain insoluble calcium oxalate crystals in most parts of the plant (leaves, stems, roots, unripe fruit), which can cause irritation in a cat's mouth, throat, and digestive system if ingested. This typically results in symptoms such as drooling, vomiting, pawing at the mouth, swelling of the lips or tongue, and difficulty swallowing. Although the toxicity is usually not deadly unless large quantities are consumed, it is still harmful and can cause significant discomfort to cats. Prompt veterinary attention is advised if a cat eats any part of a monstera plant. It is best to keep monstera plants out of reach of cats to prevent any exposure or ingestion.
