BUTTERBUR: Overview, Uses, Side Effects, Precautions, Interactions, Dosing and Reviews

Overview

Butterbur (Petasites hybridus) is a shrub. Its large leaves were used to wrap butter during warm weather, giving it the name "butterbur".

Butterbur grows throughout Europe and parts of Asia. It's also now found in parts of the US. Butterbur contains chemicals that might relieve spasms and decrease swelling.

Butterbur is used for migraine, hay fever, asthma, and many other conditions, but there is no strong scientific evidence to support most of these uses.

Some butterbur products may contain pyrrolizidine alkaloids (PAs). These chemicals can harm the liver and cause serious side effects. Do not use butterbur products unless they are certified as free of PAs.

Uses & Effectiveness

Possibly Effective for

Hay fever. Taking a specific butterbur leaf extract called Ze 339 (Tesalin, Zeller AG) by mouth seems to decrease nose discomfort in people with hay fever. This extract might work as well as 10 mg daily of cetirizine (Zyrtec) or 180 mg daily of fexofenadine (Allegra). But this extract doesn't seem to improve airflow, nasal and eye symptoms, or quality of life when taken for 2 weeks.
Migraine. Taking a specific butterbur root extract (Petadolex, Weber & Weber, GmbH & Co) by mouth over 16 weeks seems to help prevent migraines in both adults and children.

Possibly Ineffective for

Eczema (atopic dermatitis). Taking butterbur root extract by mouth doesn't reduce symptoms of eczema.

There is interest in using butterbur for a number of other purposes, but there isn't enough reliable information to say whether it might be helpful.

Side Effects

When taken by mouth: Butterbur products that do not contain pyrrolizidine alkaloids (PAs) are possibly safe when used for up to 16 weeks. Side effects might include belching, headache, itchy eyes, diarrhea, upset stomach, and drowsiness.

Some butterbur products may contain PAs. These products are likely unsafe. PAs can damage the liver and lungs and possibly cause cancer. Do not use butterbur products unless they are certified as free of PAs.

When applied to the skin: There isn't enough reliable information to know if butterbur is safe to use or what the side effects might be. Butterbur products that contain PAs are likely unsafe when applied to broken skin. Do not use butterbur products unless they are certified as free of PAs.

Special Precautions and Warnings

Pregnancy and breast-feeding: There isn't enough reliable information to know if butterbur is safe to use when pregnant or breast-feeding. Butterbur products that contain dangerous chemicals called pyrrolizidine alkaloids (PAs) are likely unsafe to use when pregnant or breast-feeding. PAs might cause birth defects and liver damage.

Children: Butterbur products that do not contain PAs are possibly safe when taken by mouth appropriately. There is some evidence that a specific PA-free butterbur rhizome extract (Petadolex, Weber & Weber, GmbH & Co) can be safely used for up to 4 months in children aged 6-17 years.

Allergy to ragweed and related plants: Butterbur may cause an allergic reaction in people who are sensitive to the Asteraceae/Compositae family. Members of this family include ragweed, chrysanthemums, marigolds, daisies, and many others. If you have allergies, be sure to check with your healthcare provider before taking butterbur.

Liver disease: Butterbur might make liver disease worse. Don't take butterbur if you have liver disease.

Interactions

Moderate Interaction

Be cautious with this combination

Medications that increase break down of other medications by the liver (Cytochrome P450 3A4 (CYP3A4) inducers) interacts with BUTTERBUR
Butterbur is changed and broken down by the liver. Some drugs increase how quickly the liver changes and breaks down butterbur. This could change the effects and side effects of butterbur.

Dosing

Butterbur extracts have most often been used by adults in doses of 50-150 mg by mouth daily. Speak with a healthcare provider to find out what dose might be best for a specific condition.

Some butterbur products may contain pyrrolizidine alkaloids (PAs). These products are likely unsafe. Do not use butterbur products unless they are certified and labeled as free of PAs.

View References

REFERENCES:

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CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

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