Cursed Buttercup Drug Interactions, Uses, Safety & More

Cursed Buttercup (Ranunculus sceleratus), also called celery-leaved buttercup, is a small flowering plant in the buttercup family. It grows in wet places like ditches, marshes, pond edges, and muddy ground across North America, Europe, and Asia. It has shiny yellow flowers and deeply divided leaves.

Despite a long history of folk use, this plant is well known for being toxic and irritating. Even its common name reflects its harsh reputation. It is not produced or sold as a mainstream dietary supplement, and most modern health authorities treat it as a poisonous plant rather than a remedy.

In traditional medicine, parts of various buttercup species, including Cursed Buttercup, were sometimes applied to the skin as a "counterirritant"—something that causes blistering or redness in an attempt to draw out pain, treat warts, or relieve joint complaints. Some folk traditions also mention it for fevers or swelling.

The scientific evidence for any of these uses is essentially absent. There are no reliable human studies showing that Cursed Buttercup safely treats any condition. The few mentions in the literature focus on its toxicity and the injuries it can cause, not its benefits. Because of this, no health claim can be supported, and the risks clearly outweigh any unproven benefit.

Buttercups contain a compound called protoanemonin, which is released when the fresh plant is crushed or chewed. Protoanemonin is highly irritating to skin and mucous membranes and is responsible for the blistering, burning, and inflammation the plant causes.

When the plant dries, protoanemonin changes into a less harmful substance called anemonin, which is why dried plant material is generally less irritating than fresh. The "counterirritant" effect people once used it for is simply this chemical irritation—not a true healing action. Most of what is known comes from chemistry and toxicology, not from controlled studies in people.

Cursed Buttercup is considered a poisonous plant. Touching the crushed fresh plant can cause painful skin redness, burning, and blisters. Swallowing it can irritate and damage the mouth, throat, and digestive tract and may lead to serious poisoning.

Pregnant and breastfeeding people should avoid this plant entirely. The same goes for children, older adults, and anyone with sensitive skin or existing health problems. Foragers sometimes confuse buttercups with edible greens like watercress or wild celery—this is dangerous, as Cursed Buttercup is not food.

If you have handled or swallowed this plant and develop symptoms, contact a doctor or your local poison control center promptly.

Skin contact with the fresh plant can cause burning, redness, itching, and blisters. Contact with the eyes can cause severe irritation.

If swallowed, it may cause mouth and throat burning, drooling, nausea, vomiting, abdominal pain, and diarrhea. Larger amounts can lead to more serious problems. Because of these dangers, there is no safe "dose," and the plant should not be eaten.

There is no established or safe dose of Cursed Buttercup. It is not a recognized dietary supplement, and no reputable product provides standardized, tested amounts.

Because the plant is toxic, the safest approach is to not use it at all. If you are looking for help with a skin, joint, or other health problem, talk with a pharmacist or doctor about safe, proven options instead.