A 50-year-old woman complains of difficulty sleeping for the…

A 50-year-old woman complains of difficulty sleeping for the last 6 months. She states that when she gets in bed, she tosses and turns because she feels that “I just need to move.” She also reports that she sometimes feels like bugs are crawling on her skin, particularly her legs, which is alleviated by getting out of bed and walking around. She then gets back in bed, but the sensations return in about 30 minutes. She ends up staying awake almost all night two to three times a week. She notes that she is falling asleep at work because she is so tired. After further history and a physical examination, what lab test should be ordered?

An intoxicated patient presents to the emergency department…

An intoxicated patient presents to the emergency department with pupillary dilation, elevated blood pressure, psychomotor agitation, chest pain, and confusion. The patient appears quite thin. Which of the following substances is most likely the cause of these symptoms?

A 6-year-old boy is brought to the doctor by his parents bec…

A 6-year-old boy is brought to the doctor by his parents because of his persistently disruptive behavior over the past year. The boy’s teacher reports that he has been provoking his peers and getting in physical altercations several times a week. At home, his parents have noticed that he frequently lashes out vindictively. Last week, he intentionally threw his mother’s favorite glass vase on the floor after being chastised for not doing his chores. This child’s symptom profile suggests a potential future risk of developing which of the following disorders