According to the American Chiropractic Association 14% of the public who see chiropractors presently go for headaches. For these patients the good news has gotten even better. Researchers at Northwestern College of Chiropractic in Minnesota, compared chiropractic care to certain drug therapies used for tension and migraine headaches.
The study, published in the Journal of Manipulative and Physiological Therapeutics, followed 218 headache sufferers who were given either chiropractic care or drug therapy or both. Pain was reduced 40 – 50% in all groups initially. However, four weeks after all care was stopped, only the chiropractic group still retained the benefits, while those who received the drug therapy lost about half of their improvement.
source: Chiropractic Research.org