Dysport, like BOTOX, is a safe alternative to correct facial wrinkles. Both of these drugs are known as muscle (or wrinkle) relaxers. Injectable fillers create a similar result, but the function behind the medicine is different. A filler works to add volume under the skin to improve facial fullness in areas where volume has been lost. This results in a smoother, softer surface. Many times, muscle relaxers are combined with an injectable filler to create maximum results.