Safety and Efficacy Study of PurTox® Botulinum Toxin Type A to Treat Frown Lines Between the Eyebrows

Subjects will receive five 0.1 mL intramuscular injections at the Day 0 Treatment Visit: two in each corrugator and one in the procerus muscle. The total treatment dose (sum of the five injections) to be administered will be 0.5 mL of the placebo (preservative-free saline).

All subjects will receive five 0.1 mL intramuscular injections (two in each corrugator and one in the procerus muscle) at each Treatment Visit. The total treatment dose (sum of the five injections) to be administered will be 30 U of PurTox. Subjects will have many Treatment Visits throughout the course of the three-year study.