CORRECT ANSWER
A 10-year-old girl is diagnosed with ADHD after evaluation for inattention, restlessness, and declining school performance. She has no medical comorbidities, and stimulant medication is being considered. Which of the following is the most appropriate assessment before starting treatment?
A. Baseline liver function testing
B. Family history of sudden cardiac death
C. Sleep study evaluation
D. Routine echocardiography
E. Urine toxicology screening