A 72-year-old man is brought to his physician by his son. The son complains that this patient has been becoming forgetful, confused, moody, and aggressive over the past few months. Which of the following neurotransmitter changes is characteristic of Alzheimer's disease?

A 72-year-old man is brought to his physician by his son. The son complains that this patient has been becoming forgetful, confused, moody, and aggressive over the past few months. Which of the following neurotransmitter changes is characteristic of Alzheimer's disease?

A 7-year-old boy is brought to the clinic by his mother for a well-child checkup. Physical exam is normal, and he is in no acute distress. A few months ago, he started taking atomoxetine for attention-deficit/hyperactivity disorder. His mother has been pleased with the results but has one complaint that the physician immediately recognizes as a common side effect of atomoxetine. Which of the following is most likely the mother's complaint?

A 65-year-old man develops new onset of symptoms of urinary incontinence and cogwheel muscle rigidity. Evaluation of bladder function reveals sphincter bradykinesia. He has begun on treatment with levodopa. Which of the following effects should the physician warn this patient of?

An 83-year-old woman with Parkinson's disease is currently being treated with carbidopa/levodopa, but her Parkinson's symptoms are worsening. She has normal liver function and no history of liver disease. Selegiline is added to her regimen. How does selegiline help in Parkinson's disease?

A 53-year-old man comes to clinic for depression. He has had decreased interest and a depressed mood for the past 6 months. He also smokes half a pack of cigarettes a day and thinks that if he could quit, that would help his mood as well. What is the most appropriate treatment for his depression and cessation of smoking?