TrenibotulinumtoxinE, then onabotulinumtoxinA 30 days later: no new safety concerns
In a phase 1 study published Oct. 27, 2026, in the Aesthetic Surgery Journal, giving trenibotulinumtoxinE, a fast-acting type E toxin, and then onabotulinumtoxinA 30 days later for frown lines raised no…