Botulinum toxin A is marketed under the brand names Botox (marketed by Allergan), Dysport (marketed by Galderma), and Xeomin (marketed by Merz Pharma). Botox relaxes and softens overactive facial muscles that cause wrinkles and lines to form in between your brow, the sides of your eyes (crow’s feet) and on your forehead. Botox will not freeze your face in place, and you will still be able to express the full range of emotions-frowning, smiling, and looking surprised.