I had botox, dysport, and xeomin injected and none has worked at all for me since almost a year and a 1/2 ago. I recently found a physician that injects myobloc for facial wrinkles. However, it's just about completely worn off in over a month. I'm not happy! I spent a lot of money on this. Another injector told me that it does not fully freeze the muscles and is intended for cervical dystonia, Parkinson's and other muscular diseases. Is this true???