1668 An electrophysiological study to demonstrate in vivo differences between two types of botulinum toxin type a (BOTOX® and dysport™)

DYSBOT: A single-blind, randomized paral

DYSBOT: A single-blind, randomized parallel study to determine whether any differences can be detected in the efficacy and tolerability of two formulations of botulinum toxin type A—Dysport and Botox—assuming a ratio of 4:1

✍ Dr. Cristina Sampaio; Joaquim J. Ferreira; Fernanda Simões; Maria J. Rosas; Mari 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 561 KB

## Background: Elston and russell discovered a difference in the biological potency of the english formulation of botulinum toxin type a or btx-a (dysport) and the american formulation (botox). potency of both is expressed in ld50 mouse units, but because of assay differences, these units are not e