Introduction: The botulinum toxin is a valuable option for the treatment of dynamic facial wrinkles. The Lanzhou botulinum toxin type A (LBTX-A) was introduced in China in the early 90’s and approved in Brazil in 2003. Objective: Evaluate the efficacy and tolerability of LBTX-A for the cosmetic treatment of dynamic wrinkles of the upper face. Material and Methods: In a prospective, open-label, multicenter study, 110 subjects of both sexes (aged from 25 to 65 years) were treated with a total of 53 U of LBTX-A each, distributed in fi fteen sites in the frontal, corrugator, procerus, orbicular ocular lateral muscles. The patients were reviewed 7 times within 180 days. Efficacy was assessed by electromyography, photographic analysis and the investigator’s and patient’s opinions. Tolerability was assessed by the incidence of adverse events.Results: Two weeks post-injection, 94% of the treated patients considered the result as good or excellent. Results lasted 90 days in most cases. After injection, most patients reported mild or no pain, and minimal and reversible side effects as facial edema (6 patients), stuffiness feeling (3 patients) and eyelid ptosis (2 patients). Conclusions: We conclude that LBTX-A is effi cient and well tolerated for the treatment of dynamic facial lines.

Keywords: BOTULINUM TOXIN TYPE A, INJECTABLES, WRINKLES, FACIAL DYNAMIC LINES

Introduction: Although there are differences arising from diverse formulations, botulinum toxin type A is widely marketed in Brazil.
Objective: To compare the efficacy and tolerability of two botulinum toxin type A formulations registered in Brazil: Botulinum toxin type A (Toxin 1) and Onabotulinumtoxin A (Toxin 2), in the treatment of glabellar expression lines through a multicenter prospective, comparative, randomized, double-blind study.
Methods: One hundred fifty-seven patients were randomized at a 1:1 (Toxin 1: Toxin 2) ratio for receiving 20U toxin for the treatment of the glabella's dynamic wrinkles. Photographic records were taken at maximum frowning in five protocol visits by independent evaluators. The assessment of results included: i) percentage of patients with improvement > 1 point in the four-point facial wrinkles scale, at maximum frowning, fifteen days after the treatment; ii) improvement in the static glabellar wrinkles; iii) pain and iv) duration of effect of the toxin.
Results: According to the independent evaluators, two weeks after injection, the rate of response at maximum frowning was 98.4% in the group treated with Toxin 1 and 98.2% in the group treated with Toxin 2. For individuals who received Toxin 1, the authors found an effect's duration of 84.5 ± 38.8 days, while for those who received Toxin 2, the effect's duration was 89.9 ± 41.1 days (p = 0.4303).
Conclusions: Botulinum toxin type A (Toxin 1) and Toxin 2 have similar effectivenesses in the treatment of dynamic glabellar wrinkles. Both preparations were well tolerated.

Keywords: BOTULINUM TOXIN TYPE A; WRINKLES; PROSIGNE; BOTOX