What are the different types of botulinum neurotoxin?

Two forms of botulinum neurotoxin are available:
  • botulinum neurotoxin type A (Botox, Dysport and Xeomin)
  • botulinum neurotoxin type B (Myobloc and Neurobloc)
Although the overall effect is similar, the specific way each one works is different. For example, both type A and type B block the neurotransmitter acetylcholine, but they do so by breaking up different proteins within the nerve cell.

Continue Learning about Dystonia


When your muscles contract involuntarily, the condition is called dystonia. Dystonia causes a twisting or clenching of whatever body part is affected. For example, when you have a stroke, the affected arm and hand may be clenched ...

and held in a strange position. Dystonia can be very mild or very severe. It can make your life very difficult and this can lead to frustration, depression or anxiety. See your doctor to treat your symptoms and talk over your frustrations.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.