The findings, published May 28 in the Journal of Adolescent Health, focused on ages 17 to 19 and shed new light on the specific types of patients who may be at risk of skipping treatment as they transition into a new stage of life, said lead author Kavitha Rao, MD, a child and adolescent psychiatrist with The Permanente Medical Group...The study tracked 4,466 17-year-old ADHD patients for up to 2 years. At age 18, adherence to filling their prescriptions dropped from 36.7% to 25.6%, and at 19 it dropped further to 19%.