Xeomin Treatment of Glabellar Lines Using OLD Versus COLD

This study involves a blinded, randomized, parallel-group design. The aim of this study is to evaluate the duration response of Xeomin in subjects with moderate to severe dynamic glabellar lines at the approved on-label dose of 20 U, however comparing the use of highly Concentrated On Label Dose (COLD) to the On Label Dose and concentration (OLD). The COLD concentration is defined as 4 Units per 0.05 mL and the OLD concentration is defined as 4 Units per 0.1 mL. The total Xeomin dose will be 20U divided into 5 injections for both study groups. However, the injection volume will differ for the two study groups, such that the OLD (4 U per 0.1 mL) group will receive a total of 0.5 mL and the COLD (4 U per 0.05 mL) group will receive a total of 0.25mL.