Abstract
Botulinum toxins (BoNT) are complex biological products. Each licensed BoNT type A (BoNTA) has its own individual characteristics resulting into different attributes, some of them being of clinical relevance. Besides profound anatomical knowledge and understanding of esthetic principles, the responsible injecting physician should be aware of those pharmaceutical and clinical properties. Especially against the background of new BoNTA formulations receiving approval by the authorities, a critical and dedicated discussion on the individual characteristics should take place, and the potential relevance on the treatment outcome should be taken into consideration.
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