Is Greater Celandine Poisonous? Orange-Yellow Sap Toxicity Guide

Greater celandine (Chelidonium majus) is toxic to dogs, cats, and humans. The plant is most recognizable by the vivid orange-yellow sap that bleeds from any cut or broken part. That sap contains alkaloids that burn mucous membranes, irritate the gut, and can cause liver damage in higher amounts. This is not the most acutely deadly plant, but it is not mild either. It should be kept out of reach of children and pets.

What Makes Greater Celandine Toxic?

The toxic components are isoquinoline alkaloids concentrated throughout the plant. The main ones are chelidonine, sanguinarine, chelerythrine, and berberine. Sanguinarine and chelerythrine are particularly irritating to mucous membranes and have cytotoxic properties at higher doses.

The sap color is the plant’s most useful identifier. Snap any stem or leaf and the bright orange-yellow liquid appears within seconds. This is the primary source of skin burns and a common route to accidental ingestion when children handle the plant and then touch their mouths.

Greater celandine belongs to the Papaveraceae family and is related to poppies. It is a common weed in Europe and has naturalized widely in North America.

Which Parts Are Toxic?

All parts of greater celandine are toxic, including the leaves, stems, flowers, roots, and seeds. The sap is present throughout the plant. The roots tend to have higher alkaloid concentrations than the above-ground portions.

Symptoms

Dogs and cats: Drooling, vomiting, diarrhea, mouth pain, and lethargy are the typical signs after ingestion. Skin exposed to the sap can develop local irritation or blistering. Significant ingestion can affect liver function.

Humans and children: The sap causes burning or blistering of skin at the point of contact. If swallowed, expect nausea, vomiting, abdominal pain, and diarrhea. Hepatotoxicity is documented in case reports involving people who consumed greater celandine herbal preparations over extended periods. Direct plant ingestion carries the same risk, especially in children who may consume more than a casual taste.

Eye contact: The sap causes significant irritation and should be flushed immediately with clean water for at least 15 minutes.

What to Do

1. Remove any plant material from the mouth and rinse thoroughly with water.
2. Wash all skin that contacted the sap with soap and water.
3. Flush eyes with clean water if sap contact occurred.
4. Call poison control at 1-800-222-1222 (US) or your vet for guidance specific to the amount ingested and the size of the person or animal affected.
5. Do not induce vomiting unless a medical professional directs you to.

Most cases involving brief contact or small accidental ingestion result in self-limiting GI upset. Larger exposures or repeated contact warrant medical evaluation given the hepatotoxic potential.

Safe Handling

Greater celandine grows as a weed in disturbed ground, garden borders, walls, and roadsides. It is not commonly grown intentionally, but may appear uninvited in gardens, especially in shaded spots near walls or fences. It grows to about 1 to 3 feet tall with deeply lobed blue-green leaves and small four-petalled yellow flowers.

Wear gloves when removing it. Wash hands thoroughly after. Avoid touching your face or eyes. Bag the plant material for disposal rather than adding it to compost.

Keep children and pets away from any areas where it grows until it has been cleared.

Frequently Asked Questions

Is greater celandine the same as lesser celandine? No. Lesser celandine (Ficaria verna, formerly Ranunculus ficaria) is a different plant in the buttercup family. Both are called celandine, but they are not closely related and have different toxicity profiles.

Can the sap cause permanent skin damage? Prolonged contact can cause blistering. Some people also experience phototoxic reactions, meaning the affected skin becomes more sensitive to sunlight. Wash the sap off promptly to minimize both risks.

Is greater celandine used in herbal medicine? It has a long history of traditional use, but liver injury from supplements containing Chelidonium majus is documented in the medical literature. It is not appropriate for self-administered use.

My dog brushed against greater celandine. Should I be worried? Brief incidental contact is unlikely to cause serious harm. Check the skin for redness and monitor for drooling or signs of mouth irritation. Contact your vet if any symptoms develop or if you think your dog ate part of the plant.