Chinese evergreen cats Poisonous, unfortunately yes. Aglaonema is one of most beautiful low light tolerant plant from Araceae family, this family has classified wonderful plants for indoors like Peace Lily, Philodendron, Pothos, Dieffenbachia, Calla lily, Arrowhead, Dumbcane, Umbrella Plant, Elephant’s Ear and Schefflera etc, apart from Aglaonema all plants in above list are poisonous to pets.
These plants are not deadly or really toxic but if eaten these can cause irritation in mouth, stomach, skin or respiratory system. These plants contain insoluble calcium oxalate, chewing these plant releases crystals which penetrate tissue resulting injuries.
Fortunately, these do not taste or smell good to attract pets to try a bite, that makes a bit safer to keep these plants in living areas or gardens.