Dieffenbachia: is it toxic to cats and dogs?

Pet safety summary

ASPCA lists Dieffenbachia as toxic to both cats and dogs. Insoluble calcium oxalates and a proteolytic enzyme can cause marked oral irritation, drooling, vomiting, and difficulty swallowing.

Dieffenbachia includes several ornamental species and cultivars commonly sold as dumb cane. Confirm the plant label when possible.

Cats

Cat conclusion: ASPCA Animal Poison Control identifies Dieffenbachia as toxic to cats. Keep the plant out of reach and contact a veterinarian or poison-control service if exposure is suspected.

Dogs

Dog conclusion: ASPCA Animal Poison Control identifies Dieffenbachia as toxic to dogs. Keep the plant out of reach and contact a veterinarian or poison-control service if exposure is suspected.

Clinical signs reported by the source

• oral irritation
• intense burning and irritation of the mouth, tongue, and lips
• excessive drooling
• vomiting
• difficulty swallowing

What to do if your pet ate it

Remove access to the plant. Save the plant label or a clear photo, note the part and approximate amount eaten, and contact your veterinarian or a poison-control service when the source identifies a toxicity risk. Do not induce vomiting unless a veterinary professional specifically tells you to.

Evidence and identity

Scientific name used on this page: Dieffenbachia spp.

Source scientific name: Dieffenbachia

Source notes: Insoluble calcium oxalates and proteolytic enzyme

Source

ASPCA Animal Poison Control plant safety entry for Dieffenbachia

Source reviewed for Batch 30 on August 3, 2026.

Emergency contacts

ASPCA Animal Poison Control: (888) 426-4435

Pet Poison Helpline: (855) 764-7661

If your pet is having trouble breathing, collapsing, having seizures, or otherwise appears critically ill, seek emergency veterinary care immediately.