Butterbur (Petasites hybridus)

Butterbur (sometimes called Petasites) is known for large, rhubarb-like leaves and stems that often grow in damp, marshy areas or moist forest grounds. It contains petasin and isopetasin—compounds that dampen inflammation and can reduce headache frequency, intensity, and duration. Research has found butterbur helpful for hay fever (allergic rhinitis) and migraines, with additional uses for cramps and asthma.

Cooling & Drying: Often used to alleviate hot, inflamed conditions such as allergies and migraines. Analgesic (Anodyne) & Anti-Allergenic: Helps relieve pain, reduces allergic responses, and has antitussive and expectorant actions beneficial for respiratory congestion.

Pyrrolizidine Alkaloids (PAs): Butterbur naturally contains PAs, potentially toxic to the liver. Some commercial extracts remove these compounds, but caution remains. Duration of Use: Limit use to about six weeks per year to minimize liver risk. General Safety: Not recommended in pregnancy or for extended periods without professional guidance.

Many theoretical interactions have been proposed, including the suggestion that butterbur may interact through effects on histamine H1-receptors. A post-marketing surveillance study identified over 50 patients taking antihistamines and a butterbur extract (Ze 339), without evidence of either a beneficial or an adverse effect.

Native to parts of Europe, Asia, and North America, butterbur thrives in wet, marshy soils, near streams, and in damp forests. The usable parts include the roots, leaves, and stems.