Comparative study between the efficacy of prabotulinum toxin-A versus onabotulinum toxin-A for the treatment of upper facial expression lines.

Prabotulinum toxin-A is a safe and effective treatment for upper-third facial wrinkles. On day three and seven, the results suggest that prabotulinum toxin-A has a quicker onset of action than onabotulinum toxin-A. On days 30 and 120, both groups showed similar FWS and Face-Q scores.