A new study published in the Headache journal is suggesting a still wider use for Botox. The makers of Botox, Allergan Inc, sponsored a study using Botox in patients with Chronic Daily Headache and migraine. The controlled study involved 355 patients, about 85% women. Each patient had at least one migraine attack during the trial period, so all of them had migraine with chronic daily headache as well. Patients had a Botox treatment every 90 days for 9 months. The patients that got Botox (rather than a placebo) did seem to get fewer headaches. However, Dr David W. Dodick from the Mayo Clinic College of Medicine (who was involved in the project) warns that results are difficult to interpret. More studies are needed.
There is very little treatment actually designed for those with chronic daily headache. Research in this area as a whole is needed, although the causes no doubt vary from person to person.