According to research recently conducted by a surgeon at OHSU, you may be able to decrease the frequency of your Botox treatments after 2 years, meaning you can still receive the same wrinkle-reducing results of Botox, but the overall cost will decrease.
In a study funded by Allergan Inc, Roger A. Dailey M.D. F.A.C.S. analyzed the results of 50 patients undergoing Botox injections for temporary correction of their glabellar lines. He concluded that after using Botox every four months for two years, the injection frequency could be extended to 6 months while still remaining effective.
In addition, his research indicates that Botox may have work as a preventive measure against wrinkles. You can read more details in the official online press release from the Oregon Health and Science University.