Butterbur Root Powder (Petasites hybridus)

Ground root of Petasites hybridus, Butterbur, the European herb that has shown clinical promise for traditional migraine and seasonal allergy support. However, the herb also contains pyrrolizidine alkaloids (PAs) - the same compound class that has restricted use of coltsfoot and comfrey. Modern recommendations restrict butterbur use to specially-processed PA-free preparations only.

Important: PA-Free Requirement

Standard butterbur root contains pyrrolizidine alkaloids (PAs) which can cause liver damage with regular internal consumption. The German pharmaceutical industry has developed specially processed PA-free butterbur preparations (notably "Petadolex") which are the form used in modern clinical studies and recommended for human consumption. Standard butterbur products that have not been specifically processed for PA removal should not be used internally. The herb has documented benefits but only the PA-free form is appropriate for internal use.

Key Facts

Botanical name

Petasites hybridus

Family

Asteraceae

Common names

Butterbur, Western Coltsfoot (despite being a different species from coltsfoot), Bog Rhubarb

Native region

Europe, Asia

Notable compound (concern)

Pyrrolizidine alkaloids (require special processing to remove)

Active compounds (for effects)

Petasins, isopetasins

Traditional and modern uses

Migraine prevention (PA-free preparations only), seasonal allergy support

What is Butterbur?

Butterbur is a tall European herb with large rhubarb-like leaves (in fact, the leaves were traditionally used to wrap butter in summer, giving rise to the English common name). The plant has long traditional European use; modern clinical research has shown specific benefits for migraine prevention and seasonal allergy support using standardized PA-free preparations. The PA-free Petadolex product (developed by Weber & Weber in Germany) has been the focus of much of the modern clinical research; equivalent PA-free products are sold by several companies.

How to Use Butterbur (PA-Free Only)

If using internally for migraine prevention or allergy support, use only PA-free preparations (standardized extracts). Typical use for clinical applications is 50-75 mg standardized extract 2-3 times daily for migraine prevention; lower amounts for allergy support. Standard butterbur root powder (not PA-free processed) should not be used internally.

Frequently Asked Questions

What is Butterbur used for?
Modern use focuses on migraine prevention and seasonal allergy support, using PA-free preparations only.

Why "PA-free only" for internal use?
Standard butterbur contains pyrrolizidine alkaloids that can cause liver damage with regular internal consumption.

What's Petadolex?
The German pharmaceutical PA-free butterbur product that has been the focus of much of the modern clinical research.

Is it the same as coltsfoot?
No; both are different species in the Asteraceae family with similar PA concerns. "Western Coltsfoot" is a confusing common name.

Can I use butterbur externally?
External use is less concerning than internal due to less significant systemic PA absorption.

Is it safe during pregnancy?
No; not recommended.

This product has not been approved by the Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease. We recommend that you consult with a qualified healthcare practitioner before using any herbal products, particularly if you are pregnant, nursing, or on any medications.