A 52-year-old man with a history of chronic low back pain caused by herniated L5 disk and depression is currently taking fluoxetine and tramadol. He presents to his primary care physician for follow-up. The combination of these two agents should raise the treating physician's concern for which of the following reactions?

A 52-year-old man with a history of chronic low back pain caused by herniated L5 disk and depression is currently taking fluoxetine and tramadol. He presents to his primary care physician for follow-up. The combination of these two agents should raise the treating physician's concern for which of the following reactions?

A 59-year-old man with multiple organ system failure and sepsis is treated with multiple medications, including gentamicin. Unfortunately, because of an error in the pharmacy, the patient is given a dose of daptomycin. Over the next few hours, the patient becomes tachypneic and develops a fever of 103°F. What is the most likely rationale for this response?

A 39-year-old man with recurrent fungal infections is seen by his primary care physician. Consideration is given to prescribing terbinafine for this patient. Although the medication can be given without regard to meals, a possible problem with this medication can be which of the following?

A 39-year-old man with recurrent migraine headaches presents to his primary care physician for evaluation and treatment. Physical examination of the head and neck is unremarkable. Treatment with zolmitriptan has begun. This agent acts on which of the following receptors in the brain?

A 78-year-old woman with a long history of chronic open-angle glaucoma has failed numerous treatments with oral and topical agents. She has begun on a treatment regimen with an ophthalmic solution of echothiophate. Which of the following effects must the treating physician be aware of?