A medical student is performing a summer research project evaluating the pharmacologic effects of atropine at varying doses. Doses are extrapolated from normal human doses of this agent. Slow infusion of this agent to a steady state dose of 0.5 mg would be expected to produce which of the following effects?

A medical student is performing a summer research project evaluating the pharmacologic effects of atropine at varying doses. Doses are extrapolated from normal human doses of this agent. Slow infusion of this agent to a steady state dose of 0.5 mg would be expected to produce which of the following effects?

A 58-year-old woman with multiple sclerosis presents to her primary care physician for follow-up. She ambulates well and has few issues with her disease. Which of the following agents may be beneficial in slowing the progression of this disease?

A 78-year-old man with generalized anxiety disorder and mild dementia is being seen by his primary care physician. Physical examination of the heart, lungs, and abdomen are within normal limits. Which of the following would be the best treatment option for his generalized anxiety disorder?

A 39-year-old man with recurrent epileptic seizures presents to his primary care physician for follow-up. He has no pertinent past medical, surgical, or family history in relation to his seizures. CT scan of the head reveals normal cerebral and cerebellar structures. There is no evidence of hydrocephalus. What is the most likely explanation of this patient's seizures?

A 16-year-old boy is brought to the urgent care clinic after suffering an episode of lip smacking followed by stiffness and convulsions. His mother explains that this is the third such attack in the past 2 years and that each attack has lasted about a minute. The pediatrician prescribes carbamazepine to control his seizures. What is the mechanism of action of this agent?