Health Guide
Drug Guide


What is it?

Butterbur is an herbal medicine used to treat migraine headache, asthma, and bronchitis. Butterbur has also been used for cough and urination and stomach problems.

Other names for Butterbur include: Petasites hybridus, Petasites officinalis, Bogshorns, Blatterdock, Langwort, Butter dock, Bog Rhubarb, and Exwort.

Ask your doctor, nurse, or pharmacist if you need more information about this medicine or if any information in this leaflet concerns you.

Before Using:

Tell your doctor if you


Talk with your caregiver about how much Butterbur you should take. The amount depends on the strength of the medicine and the reason you are taking Butterbur. If you are using this medicine without instructions from your caregiver, follow the directions on the medicine bottle. Do not take more medicine or take it more often than the directions tell you to.

To store this medicine:

Keep all medicine locked up and away from children. Store medicine away from heat and direct light. Do not store your medicine in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down and not work the way it should work. Throw away medicine that is out of date or that you do not need. Never share your medicine with others.


Side Effects:

Stop taking your medicine right away and talk to your doctor if you have any of the following side effects. Your medicine may be causing these symptoms which may mean you are allergic to it.

Other Side Effects:

This medicine may also cause other side effects. Tell your doctor if you have side effects that you think are caused by this medicine.


1. Schapowal A: Randomised controlled trial of Butterbur and cetirizine for treating seasonal allergic rhinitis. BMJ 2002; 324:144-146.

2. Grossmann M & Schmidramsl H: An extract of Petasites hybridus is effective in the prophylaxis of migraine. Int J Clin Pharm Thera 2000; 38(10):430-435.

3. Blumenthal M, Busse WR, Goldberg A et al (eds): The Complete German Commission E Monographs, 1st ed. American Botanical Council, Austin, TX; 1998.

Last Updated: 9/15/2016

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