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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.

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