Pro-Tox, inc.

This clinical trial is an extended clinical trial for test subjects who participated in the phase 3 clinical trial of PT_BTA_P3_21 (clinical trial plan number) and completed follow-up observation up to 16 weeks after administration of clinical trial drugs, and evaluates the effectiveness and safety of repeated administration of protoxin in those with moderate or severe brow wrinkles.

This study will be conducted in Phase Ⅲ clinical trials. In Phase Ⅲ, subjects with moderate to severe glabellar lines are enrolled and those who are judged to be eligible for this study will be injected with the "PROTOXIN" at a total of 20U(4U/0.1mL each) in five sites of the glabellar lines. The investigational product is administered once, maintaining double-blind for a total of 16 weeks of observation. Thereafter, efficacy and safety are assessed by comparing with BOTOX® after regular visits conducted at 4,8,12 and 16 weeks.

This study will be conducted in Phase I/II clinical trials. In Phase I, subjects with moderate to severe glabellar lines are enrolled and those who are judged to be eligible for this study will be injected with the "PROTOXIN" at a total of 20U(4U/0.1mL each) in five sites of the glabellar lines. Safety is assessed after 12 weeks. In Phase II, subjects with moderate to severe glabellar lines are enrolled and will be injected the "PROTOXIN" or the "BOTOX®" at a total of 20U(4U/0.1mL each)in five sites of the glabellar lines. Thereafter, efficacy and safety are assessed by comparing with BOTOX®.