Petadolex is a standardized high potency (30:1) lipophilic extract of the rhizome (root) of the Butterbur plant (Petasites hybridis.) Each capsule contains 50 mg. Inert ingredients include riboflavin, glycerol, gelatin, sorbitol, and titanium dioxide.
Petadolex is a migraine headache prophylactic. It is anti-convulsive, pain-alleviating, and relaxing.