This article describes poisoning caused by eating parts of a Calla lily plant.

• Oxalic acid
• Asparagine
• A protein found in this plant

Note: The roots are the most dangerous part of the plant.

• Calla lily genus Zantedeschia

Note: This list may not be all inclusive.

• Burning in mouth and throat
• Swelling of mouth and tongue
• Redness, swelling, pain, and burning of the eyes
• Nausea or vomiting
• Diarrhea

Seek immediate medical help. Wipe out the mouth with cold, wet cloth.

Give the person milk, unless instructed otherwise by a health care provider. DO NOT give milk if the patient is having symptoms (such as vomiting, convulsions, or a decreased level of alertness) that make it hard to swallow.

Determine the following information:

• The patient's age, weight, and condition
• The name of the product (ingredients and strengths if known)
• The time it was swallowed
• The amount swallowed

The National Poison Control Center (1-800-222-1222) can be called from anywhere in the United States. This national hotline number will let you talk to experts in poisoning. They will give you further instructions.

This is a free and confidential service. All local poison control centers in the United States use this national number. You should call if you have any questions about poisoning or poison prevention. It does NOT need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week.

Bring the plant with you to the hospital, if possible.

See: Poison control center - emergency number

The symptoms will be treated as appropriate.

Oxalate plants may cause swelling severe enough to block the airway but this is very rare.