There seems to be quite a bit of confusion out there regarding Botox® and Dysport®. They are both forms of botulinum toxin, which relax muscle. By carefully injecting these compounds into appropriate facial muscles, facial wrinkles can be improved. The dose of each is represented in “units”. However, because each of these products is manufactured a little bit differently, and the two compounds are chemically slightly different, one “unit” of Botox® is not equivalent to one “unit” of Dysport®. In fact, it takes about two “units” of Dysport® to get the same effect as one “unit” of Botox®. Because the cost of one unit of Dysport® is about half the cost of one unit of Botox®, the cost of two “units” of Dysport® and one “unit” of Botox® is about the same. Does one work better than the other? At this point in time, as far as I can tell they are equivalent.