BOTOX is a non-surgical cosmetic treatment for moderate to severe frown lines. It is typically used in people aged 18 to 65. BOTOX works by blocking nerve transmission to temporarily reduce the contractions of the facial muscles that cause frown lines. Your doctor will administer several tiny injections of BOTOX directly into the muscles of your face. Prior to injection, your doctor will determine where to administer the injections by examining your ability to move certain muscles in your brow area. You can receive BOTOX injections every 4 months.