According to Medscape.com the average amount of Botox (botulinumtoxinA) given can vary between clients. To soften Glabellar lines (number 11 lines between the eyebrows): give a total dose of 20 units. To treat Forehead lines: 20 units. To relax Canthal lines (Crow’s Feet): administer a total of 24 units (12 units per side). They go on to recommend considering adjusting the dose if no prior botulinum toxin treatment or based on client’s response. Our office routinely does this as we want our clients to have natural, beautiful looking results.