Conditions: Moderate to Severe Glabellar Lines
Keywords: Moderate to Severe
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 185
Healthy volunteers: no

Brief summary:
The purpose of this study was to demonstrate the safety and the efficacy of a single treatment of an injectable liquid form of Clostridium botulinum toxin type A haemagglutinin complex (BTX-A-HAC; hereafter referred to as BTX-A-HAC Next Generation (BTX-A-HAC NG)), used for the improvement in the appearance of moderate to severe glabellar lines (the lines between the eyebrows).

Detailed description:
At the Baseline Visit (Day 1), subjects were randomised in a ratio of 2:1 to receive either BTX-A-HAC NG solution (50 U) or placebo. Randomisation was stratified according to gender and severity of glabellar lines at maximum frown (moderate to severe) at Baseline. A single dose of BTX-A-HAC NG solution 50 U or placebo was injected on Day 1. Subjects were then monitored at the study centre for 30 minutes. On Day 4, subjects were contacted by telephone for adverse event monitoring and to record concomitant medications and treatments.

Subjects attended follow-up visits at the study centre on Days 8, 15, 29, 57, 85, 113, 148 and 183. The Day 183 follow-up visit was the end of study visit; all subjects who had completed the Day 183 Visit were considered to have completed the study.

Arms:
arm 1: Clostridium Botulinum Toxin Type A (BTX-A-HAC NG) 50 Unit (U) solution, single dose (intramuscular injection). The total treatment volume (0.25 mL) was divided into five injections (0.05 mL per injection) injected in five predefined sites across the glabellar region. A total of 50 U was injected. arm 2: Single dose (intramuscular injection). The total placebo volume (0.25 mL) was divided into five injections (0.05 mL per injection) injected in five predefined sites across the glabellar region.

Interventions: intervention 1: Botulinum toxin type A intervention 2: Placebo
Intervention descriptions: intervention 1: A solution containing 50 U in 0.25 mL (200 U/mL). Each vial contained 0.625 mL of deliverable volume of solution. A volume of 0.25 mL, containing 50 U of BTX-A-HAC NG (i.e. 10 U/0.05 mL) was withdrawn from the vial into a syringe for administration. The total treatment volume (0.25 mL) was divided into five injections (0.05 mL per injection), each of which was to be administered into predefined sites across the glabellar region (two injections into each corrugator muscle and one injection into the procerus muscle). intervention 2: A solution containing only the excipients of BTX-A-HAC NG (identical in appearance to the active product). Each vial contained 0.625 mL of deliverable volume of solution. A volume of 0.25 mL was withdrawn from the vial into a syringe for administration. The total treatment volume (0.25 mL) was divided into five injections (0.05 mL per injection), each of which was to be administered into predefined sites across the glabellar region (two injections into each corrugator muscle and one injection into the procerus muscle).

Protocol document: