The researchers reviewed scientific studies on the four preparations of botulinum toxin and found this type of treatment is generally safe and effective in treating chronic migraines, spasticity, cervical dystonia, and blepharospasms.
Treatment guidelines for these conditions were last updated in 2008, but at the time there was not enough evidence to recommend botox as a mode of treatment for chronic migraine. This time around, the authors had more evidence to support their decision to include chronic migraine on the list of conditions that may be treated using botox, as slight benefits from botox therapy were detected in chronic migraine sufferers.
The new guidelines will be presented at the American Academy of Neurology’s annual meeting held in Vancouver, Canada.
Sources:
http://www.neurology.org/content/early/2016/04/15/WNL.0000000000002560