Feverfew is an herb that grows in several regions that has been used to treat and prevent various ailments and conditions including fevers, constipation, diarrhea, and migraines. The dried leaves are turned into tablets and teas for ingestion. It is now used for migraine prevention, specifically an extract called MIG-99 that has been determined to be effective by the American Academy of Neurology and the American Headache Society.
Always consult with your doctor before taking feverfew or any supplement for migraines. Doses will vary by patient according to the physician and dietician but generally, adults will take 50-150 mg once a day for up to 4 months.
While there are no serious side effects of feverfew, they can include nausea, digestive problems, and bloating. People who stop taking feverfew after regular use may experience side effects such as difficulty sleeping, anxiety, and headaches. Feverfew should not be taken during pregnancy.