Butterbur

Name: Butterbur

Scientific name: Petasites hybridus
Possible uses: asthma, swelling, painful joints, cramped muscles, rashes, wounds, nagging coughs, migraines, allergic rhinitis, bronchitis,
Part of plant used: roots, leaves
Family: Asteraceae
Active constituents: petasin, isopetasin

Contraindications: pregnancy, lactation

Toxic constituents: pyrrolizidine alkaloids

Sources

National Geographic Guide to Medicinal Herbs by Rebecca Johnson, Steven Foster, Tieraona Low Dog, MD, and and David Kiefer, MD

The medical plant butterbur (Petasites): analytical and physiological (re)view.