Botox is a simple and very safe method to eliminate problematic lines and wrinkles of the forehead and crows-feet areas. Botox works by blocking nerve impulses to the underlying muscles which makes the muscles weak and temporarily ineffective. Botox is administered as an injection (very tiny needle) directly into the area where improvement is desired. It usually takes 2-3 days for the effects of Botox to become apparent. Although it varies from patient to patient, the beneficial effects of Botox usually last 4-5 months, and must be repeated periodically to maintain the desired effect.