What is Feverfew?

Feverfew is an herbal product predominently used for treating headaches. It works to inhibit the release of two inflammatory substances, serotonin and prostaglandins, both believed to contribute to the onset of migraines. By inhibiting these amines as well as the production of the chemical histamine, feverfew controls inflammation that constricts the blood vessels in the head, and prevents blood vessel spasms which may contribute to headaches.

It may also relieve dizziness, tinnitus, arthritis, fever, and painful or sluggish menstruation.

Before using this herbal product, inform your doctor if you are allergic to feverfew; if you are pregnant, plan to become pregnant, or breast feeding; if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement; if you have a blood clotting disorder, kidney or liver problems, or vitamin K deficiency.

Important information about Feverfew

Side effects from feverfew include:

  • abdominal pain;
  • indigestion;
  • flatulence;
  • diarrhea;
  • nausea;
  • vomiting;
  • nervousness.

People with allergies to chamomile, ragweed, or yarrow will likely be allergic to feverfew and, therefore, should not take it.

Feverfew may increase the tendency to bleed, especially in individuals with bleeding disorders or taking blood-thinning medications, such as aspirin or warfarin. Do not use feverfew if you have bleeding disorders or are taking blood-thinning medications unless you are under the supervision of a doctor.

Pregnant and nursing women as well as children under 2 years of age should not take feverfew.

This information is advisory only. It does not contain all information about this medication. If you have any questions about feverfew, ask your doctor, pharmacist, or health care provider.

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