Contrary to public opinion, botulinum toxin treatment does not “tighten” the facial muscles. The success of a brow lift lies in relaxing the muscles which normally pull the brow down, and leaving the muscles which lift the brows activated. This means there will be some wrinkling still when lifting the brow.
Not everyone is suitable for a brow lift, and results are limited by personal anatomy. Your practitioner will discuss your options with you.