There are several varieties of feverfew, among them a double flowered blossom and a variegated leaf cultivar.
For a migraine, take one dried blossom and steep it in a cup of boiling water for ten minutes. Take up to three cups per day.
The name Feverfew is derived from the Latin "febrifugia" , meaning a substance which drives out fevers.
Volatile oils, stearoptene
Aperient,carminative, bitter, used for hysteria, nervousness and to promote menstruation. Moth repellant, Small quantities cut the grease in foods. A warmed external application is used or gas or colic., depression,and with sugar or honey for coughs, wheezng and difficulty with breathing. Relieving insect stings, migraine.
Though my herb books do not note potential difficulties, all herb remedies should be explored as to dosage, used in moderation because many of them can be used homeopathically (in minute, but effective doses).
In A Modern Herbal another herb is employed as an embalming agent. Its ingredient properties are identical with a property of feverfew,stearopten
Stearic acid is used in candles and soaps as a hardener, so, like nitrate -cured meats, Feverfew should be taken in moderation.