It can only be used on the forehead, maybe down as far as crow's feet. Remember that you loose ability to form facial expressions with the muscles that are taken out. Personally, I find some botox faces to be a little too serene looking and blank for my taste. Best to try a small area first, as opposed to the whole top third of your face. Collagen can be injected for wrinkles that are a bit more defined.
Laser treatments are the newest thing.
Unlike lasers of the past, which involved major skin re-surfacing and recovery time, today's options are more varied and less drastic. Diminishing fine lines and pigmented areas, and slight overall tightening can be achieved with different types of lasers. You would actually increase wrinkles, if you did it enough. It is like the opposite of botox. Hormone replacement or estrogen.