Moreover, it found "significant geographic differences" in ADHD drug utilization throughout the U.S. According to Express Scripts research.
"The concentration of ADHD medication users in Southern states is higher than in other regions of the country. In 2012, the proportion of Southerners of any age who were taking ADHD medications was 3.6%, compared with 2.9% for the country as a whole. Boys between the ages of 12 and 18 who live in the South had the highest prevalence nationwide, reaching 10.5% while nationally, 9.3% of boys that age are using ADHD medications."Here's the map showing the prevalence of ADHD medication utilization by state in 2012: