Feverfew has regained its deserved reputation as a primary remedy in the treatment of migraine headaches, especially those that are relieved by applying warmth to the head. It may also help arthritis when it is in the painfully active inflammatory stage. Dizziness and tinnitus may be eased, especially if it is used in conjuction with other remedies. Painful periods and sluggish menstrual flow will be relieved by Feverfew. CAUTION: Feverfew should not be used during pregnancy because of the stimulant action on the womb. The fresh leaves may cause mouth ulcers in sensitive people. The New Holistic Herbal by David Hoffmann Pg. 200