Abstract
Peripheral blocks with botulinum toxin (BoTN) and phenol are the treatment of first choice in the management of focal spasticity. This review will focus on phenol blocks, presenting some historical aspects, principles of action, main indications and the clinical applicability of this substance. The purpose of this review is to remind that, when its indications are respected, phenol has shown a good balance between efficacy and safety. Since it is an extremely low-cost drug, phenol should be considered as the ideal agent for large-scale use in resource-poor rehabilitation centres.
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