Chemical Brow Lift Case ID: 0549 PrevView Front: A patient seen before and after botulinum toxin injections which have created a chemical brow lift without the need for any surgery. NextView NextPrevious Botulinum toxin injections used to achieve a chemical brow lift. These are often given 2-3 weeks prior to an upper lid blepharoplasty to achieve the best height and contour to the brows before surgery is performed.