A 30-year-old businessman presents to you for a psychiatric evaluation. When he was in high school,
this patient received the diagnosis of attention-deficit/hyperactivity
disorder (ADHD) from his pediatrician, but a recent referral to
a psychiatrist led to the diagnosis of bipolar disorder. Which of
the following clinical characteristics, unique to bipolar disorder
and not shared with ADHD, might be helpful in clarifying the diagnosis?
A. Grandiosity.
B. Distractibility.
C. Impulsivity.
D. Mood swings.
E. Irritability.