BACKGROUND The aesthetic use of botulinum toxins is widely accepted in routine treatment of glabellar lines. OBJECTIVE To strengthen existing efficacy and safety data, and examine subject satisfaction concerning abobotulinumtoxinA (ABO) treatment for moderate to severe glabellar lines. MATERIALS AND METHODS A 150-day prospective, single-dose, multicenter, randomized, parallel-group, placebo-controlled, double-blind study of 300 subjects treated with ABO (50 Units [U]). Response was defined as having no or mild glabellar lines after treatment (primary objective was Day 30 response). Glabellar line severity, onset and duration of effect, satisfaction, treatment emergent adverse events (TEAEs), and treatment-related adverse events (TRAEs) were assessed. RESULTS Median time to onset of effect was 2 days. Day 30, ABO treatment response was 89% and 85% for investigator and subject assessments, respectively (p < .001 vs placebo). At Day 120, 60% of subjects demonstrated ≥1 grade improvement and 45% at Day 150. Subject satisfaction concerning glabellar line appearance was high (93%) at Day 14 and maintained by 35% through Day 150 with ABO treatment. No serious AEs were related to study treatment. CONCLUSION Most ABO-treated subjects sustained ≥1 grade glabellar line improvements over 120 days, and satisfaction was maintained by >30% of subjects throughout 150 days. ABO was well tolerated.

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BACKGROUND Two licensed reconstitution volumes may be used to achieve the recommended abobotulinumtoxinA (ABO) dose for glabellar line correction. OBJECTIVE Comparison of efficacy, safety, and subject satisfaction concerning treatment of moderate to severe glabellar lines with 2 different ABO reconstitution volumes. MATERIALS AND METHODS Phase IV, prospective, randomized, multicenter, subject- and evaluator-blinded study: 60 subjects received 1 ABO (50 units) treatment, administered as a 1.5- or 2.5-mL reconstitution. Primary objective was Day 30 improvements (≥1-point) in glabellar line severity. Onset of effect, duration, subject satisfaction, and treatment-related adverse events (AEs) were assessed. RESULTS At Day 30, 90.0% and 86.7% of subjects achieved ≥1-point improvements with 1.5- and 2.5-mL reconstitutions, respectively. Median time to onset of effect was 48 hours after treatment. At 24 hours, 26.7% achieved ≥1-point improvements with the 2.5-mL reconstitution versus 6.7% with the 1.5-mL reconstitution. Maximum response was at Day 14, and >40% maintained efficacy through Day 120 in each group. High subject satisfaction was sustained throughout observation. Most AEs were mild. No serious AEs were reported. CONCLUSION Both ABO reconstitutions were well tolerated and effective in correcting glabellar lines with no significant differences concerning efficacy or duration of effect. No serious AEs were reported.

Two cases of intussusception of the appendix are reported. In both cases there was a palpable tumour within the caecum and a short thickened appendix. Both intussuceptions were predominantly mucosal and of a type not previously described.