[Botulinum toxin in the treatment of facial dystonia: evaluation of its efficacy and patients' satisfaction along the treatment].

Purpose: To study the efficiency of botulinum toxin treatment in facial dystonia patients and their satisfaction along treatment.

Methods: Retrospective study of 42 facial dystonia cases followed at the Oculoplastic Surgery Department of the "Hospital das Clínicas" of the University of São Paulo.

Results: Following the first injections, 45.