I have been injecting Voluma almost 3 years, and have needed to dissolve it one time. The situation was unique, as the patient was a 26 year old asian man who had a flat face and wanted to try cheekbones. It was a beautiful result. In the office he loved it. He went home, and his friends teased him for doing it, so he came back and asked me to undo it.It took A LOT of hyaluronidase to dissolve it (the brand I use is called Hylenex). If memory serves me correct, I think it took about 5 entire vials to completely dissolve 2 syringes of Voluma. Compared to Juvederm, it took much more per volume. We didn't do it all in one visit, but each time to his satisfaction. It was relatively easy. I hope that helps.