Allergan has just received FDA approval for Juvederm XC, the newest hyaluronic acid injectable filler formulated with lidocaine for greater comfort. In their study they found that 93% of the patients treated with Juvederm XC had less pain than when treated with the non-lidocaine formulation of Juvederm.
That sounds good to me. I'm very fond of using hyaluronic acid fillers due to their versatility and longevity. The only knock on them has been that they are somewhat uncomfortable to have injected. I hope that the new Juvederm XC will make the experience of injectable fillers much more pleasant.