A randomised, double-blind comparison of 20 units of onabotulinumtoxinA with 30 units of incobotulinumtoxinA for glabellar lines.

Background: Biological activity data indicate that the units of incobotulinumtoxinA are not equivalent to those of onabotulinumtoxinA.

Objective: This study compared 20 units of onabotulinumtoxinA with 30 units of incobotulinumtoxinA in the treatment of glabellar lines.

Methods And Materials: In this multicenter, randomised, double-blind study, subjects with moderate or severe glabellar lines received a single treatment with 20 units of onabotulinumtoxinA (n = 112), or 30 units of incobotulinumtoxinA (n = 112).