Thank you for your question. Your concern is one that I will hear from my patients at times. While any injectable drug always carries risk, I would not say that you are at any greater risk from having 20 units of Dysport injected. Dysport, in my experience, is very safe and does not 'spread' outside the muscle in which it is injected. If your provider is board certified, and has experience with injecting Dysport, my thought is that you should start to see results within two weeks. You should see a softening of your forehead lines and wrinkles. I would discuss your concerns with your injector, as well, as he/she knows exactly what was performed at your treatment. I hope that this helps!-David Gilpin