Botulinum toxins types A and B for brow furrows: preliminary experiences with type B toxin dosing

Abstract

Both types of botulinum toxin are effective at correcting deep glabellar furrows. At least with the doses used, BTX-B has a quicker onset of action and BTX-A has longer benefit for glabellar wrinkles. These data strongly suggest that further dose ranging studies of BTX-B are necessary and indicated in controlled double blind studies in a larger patient population.