Comparison of botulinum toxin serotypes A and B for the treatment of cervical dystonia

• Comella, Dystonia Study Group, Neurology 2005.

• Both serotypes of botulinum toxin (BoNTA and BoNTB) had equivalent benefit in subjects with cervical dystonia at 4 weeks. BoNTA had fewer adverse events and a marginally longer duration of effect in subjects showing a clinical response

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