Traditionally Butterbur has been used to treat spasms in the respiratory and digestive tract. In addition, Butterbur is said to inhibit the production of histamine, which helps to keep air passages open. This may help to relieve allergic congestion and seasonal allergies.
Butterbur is very popular in Europe and becoming increasingly popular in America as a sound way to minimize neurological discomfort. The exact cause of this is still unclear but neurologically severe headaches 
may be caused by a number of biological factors. Some researchers believe that they stem from an imbalance in the central nervous system that encourages the release of blood-dilating peptides. This could result in inflammation of the brain's thin outer layer, the cerebral cortex. As pressure builds, blood flow becomes more restricted, potentially enhancing migraine headache symptoms. (Carle, R., Plant-based antiphlogistics and spasmolytics' (translated from German). Z Phytother. 1988; 9: 67-76).
Other physicians think that many commonly consumed food items trigger migraines or that they could be hereditary. A 12 week clinical study showed that the active compounds in butterbur can prevent peptidoleukotriene biosynthesis, which is an inflammatory process that has been linked to the onset of migraines. (Bickel D, Roder T, Bestmann, J. Identification and characterization of inhibitors of peptide-leukotriene-synthesis from Petasites hybridus. Plant Medica. 1994; 60:31-322).
Also of note is the writing 'Petasites Hybridus Root (Butterbur) is an effective prevention for migraine" by Lipton, Einhaupl and Gobel (Neurology, 2004; 2240-4).
Feverfew comes from the same tribe of plants (asteraceae) as the 
daisy. Since the 1st century A.D., it has been used for the treatment of headache, stomachaches and fever. Feverfew has anti-inflammatory, stimulant, relaxant, decongestant and anti-coagulant properties.
Feverfew is mainly used for the treatment and prevention of frequent and serious migraine headaches. From Natural Health (2007-03-01) we are told that "in a recent, well-designed clinical trial, 170 German patients took a placebo pill or an extract of feverfew for 16 weeks. Those taking Feverfew had significantly fewer migraines."
Magnesium is a mineral that is used for many purposes. The hsbaltimore, Health Series Institue e-Alert (September 14, 2004) website informs us a good intake of magnesium may promote bone flexibility, help prevent type 2 diabetes and heart disease. Recent studies show that magnesium is also essential for keeping your teeth healthy. There have also been studies on a relationship between magnesium and headaches. A study by A. Trauninger (Oral magnesium load test in patients with migraine, Headache, 2002, 42(2): 0, 114-9) showed magnesium deficiencies to be common in those who suffer from migraines.
White Willow (Salix alba [Latin]), also known as weeping willow, and Salicin willow, has been renowned for its pain- and inflammation-relieving abilities for thousands of years. The bark of the white willow tree contains salicin, an analgesic compound from which from which salicylic acid and later acetylsalicylic acid (otherwise known as aspirin) were derived. Today, herbalists recommend white willow bark for headache, fever, arthritis, and other disorders characterized by pain and inflammation, including heart disease.
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