BOTOX Botulinum neurotoxin is a well-known muscle relaxant. It can be used in a variety of dilutions and subtle ways to reduce dynamic wrinkles and lines of the forehead, glabella (area between the eyebrows) and eyes. Used judiciously Botox can open up the eyes, elevate the brows, reshape the lower jaw, drop the upper lip, reverse downward turned corners of the mouth, relax cobbling of the chin and release tight central bands of an ageing neck.