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Safety and efficacy of Botulinum toxin type A preparations in cerebral palsy - an evidence-based review.

The introduction of botulinum toxin more than 25 years ago for the management of paediatric lower and upper limb hypertonia has been a major advance. BoNT-A as a part of multimodal treatment supports motor development and improves function disturbed by spasticity or hypertonia. The aim of this paper was to compare the efficacy and safety of three major BoNT-A preparations present on the market: abo-, inco-, and onaobotulinumtoxinA in the treatment of children with cerebral palsy. Based on an analysis of the available literature, all three preparations have been established to reduce hypertonia in the upper and lower extremities, with some conflicting evidence regarding function. There were no differences in treatment safety, with a low incidence of adverse events which were mostly temporary and mild. Any form of universal conversion ratio between all preparations is not recommended.