Botox is a prescription medicine that is injected into facial muscles to temporarily decrease wrinkles, creating a youthful, rested, peaceful and happy appearance. It can be used to drop a gummy smile, cease frowning, and arch the brow. Botox helps the inside match the outside, reflecting the youth and energy you feel but are no longer showing. It can also temporarily stop or decrease underarms from sweating. Facial results typically last 3-4 months; underarms 5-9 months. The number of units are dependent on age, gender, and desired results, with an average of 20 - 55 units.