About botulinum toxin type A
|Type of medicine||A bacterial neurotoxin|
|Used for||To prevent headaches associated with chronic migraine in adults|
Botulinum toxin type A is a protein substance which is produced by the bacteria Clostridium botulinum. It is a neurotoxin which means that it interferes with the way nerves work. To be eligible for this treatment you must have headaches for 15 or more days each month, with migraine headaches being on at least eight of these days.
Botulinum toxin type A is thought to work in chronic migraine by relaxing muscles and by blocking the pain signals which are involved in the development of a migraine. These actions may have the effect of stopping a migraine headache from being triggered.
Botulinum toxin injections are also used for cosmetic purposes and for muscle spasms. This leaflet does not cover the use of botulinum toxin type A in these ways.