Butterbur (Petasites hybridus) is an herb most commonly known for its use in migraine prevention, although it is falling out of favor due to the risk of liver toxicity.[1] Its name comes from its large hat-like leaves which historically were used to wrap butter to protect it from the weather. Butterbur typically grows in North America, Asia, and Europe within wet marsh areas or close to rivers or streams.[2]
What is butterbur?
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•Last Updated: May 16, 2025
Butterbur (Petasites hybridus) is an herb primarily used for migraine prevention, though its popularity is declining due to potential liver toxicity. It is named for its large leaves, which were historically used to wrap butter, and it typically grows in wet marsh areas or near rivers in North America, Asia, and Europe.