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Comparison of Safety and Efficacy of Two Brands of Botulinum Toxin A for the Treatment of Lateral Canthal Lines (Crow's Feet): A Split-Face Study.

AIM: To compare the safety and efficacy of Stunnox with the international brand of botulinum toxin A on lateral canthal lines.

MATERIALS AND METHODS: This was a nonrandomized, controlled, pilot, split-face study in 47 patients who were given two brands of Botulinum toxin A for the treatment of lateral canthal lines for 12 weeks. Evaluation of lines was assessed with grades of 0 (none), 1 (mild), 2 (moderate), and 3 (severe) at a maximum smile and rest by using ANTERA 3D camera.

RESULTS: There was a statistical significance in lateral canthal lines wrinkles reduction on the Stunnox sides compared to pretreatment and at weeks 4, 8, and 12, respectively (all P < 0.05). The wrinkle reduction was similar to the effects of the control internationally available brand of botulinum toxin A. The clinical improvement of lateral canthal line wrinkles was greatest at 4 weeks after injection and the improvement lasted until 12 weeks of treatment with no adverse events observed.

CONCLUSION: In this split-face study, Stunnox botulinum toxin A showed a moderate but significant wrinkle-soothing effect without obvious side effects on the lateral canthal.

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