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Feverfew is a short bush with flowers like daisies. People have used feverfew over the years as folk medicine for many ailments.

Today, its dried leaves -- and sometimes stems or flowers -- are made into supplements.

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Why do people take feverfew?

People take feverfew by mouth or sometimes apply it directly to their gums or skin.

Two common reasons people take feverfew are to try to prevent migraine or lessen arthritis symptoms.

Researchers haven't proven the effectiveness of feverfew for rheumatoid arthritis.

Studies for migraine have had mixed results. Some studies show it may help reduce how often you get migraines, especially if you get them often. But more research is needed.

There isn't enough evidence to prove that feverfew is effective for other medical problems. This includes those that affect the gastrointestinal system, such as:

There also isn't enough evidence to show feverfew is effective for the wide range of other reasons people take it. This includes such conditions as:

There isn't a clear optimal dose of feverfew for any condition. Quality and active ingredients in supplements may vary widely from maker to maker. This makes it hard to set a standard dose although standardized extracts have been studied in research on humans.

Can you get feverfew naturally from foods?

Some people eat the feverfew leaves, but they are bitter and may hurt your mouth.

What are the risks of taking feverfew?

Side effects. People have not reported serious side effects of feverfew. Researchers have used it safely with people in studies lasting up to four months. No one knows whether it is safe if you use it longer than that.

Side effects may include symptoms affecting the mouth, such as:

These side effects may be more common if you chew on feverfew leaves.

Other side effects from feverfew affect the digestive system. They may include:

Other possible side effects include:

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