Asteraceae · rhizome, leaf
Butterbur
Petasites hybridus
PA-free extracts have migraine-prevention and some allergic-rhinitis trials. Unprocessed plant is a toxicity object.
Safety first
Unprocessed plant contains unsaturated pyrrolizidine alkaloids (hepatotoxic, genotoxic). Only PA-free specified extracts belong in any serious conversation — and they remain restricted/professional. Asteraceae allergy.
Tradition vs trials
Traditional record. European spasmolytic tradition later industrialized as PA-removed extracts.
Trial literature. PA-free rhizome extracts have human migraine-prevention files. Allergic-rhinitis files exist. Hepatotoxicity of crude plant is the hard stop.
Practical ranges
Educational ranges — not a prescription. Culinary use is not an extract.
PA-free extract
Migraine-prevention trial extracts are specified proprietary products; this catalog will not copy a brand as a prescription
ESCOP / NCCIH — Educational range only — not a prescription. A licensed clinician individualizes product, dose, and duration.
Pregnancy, nursing, children
- Pregnancy. Avoid.
- Nursing. Avoid.
- Children. Not a pediatric DIY plant.
Contraindications
- any non-PA-free product
- liver disease
- pregnancy
Key interactions
- hepatotoxic drugs · avoid
Do not stack crude PA plants. Even PA-free extracts remain professional.