[Excerpt] The majority of adult users report first trying tobacco between the ages of 10 to 19 years.¹ Recently, there has been an increase in new smokers starting between the ages of 18 to 23 years.² Adolescent nicotine use is associated with increased risk of nicotine, alcohol, and psychostimulant use in adulthood.³ Adolescents and adults with ADHD are more likely to smoke.⁴