A 58-year-old woman with a history of myasthenia gravis presents to the emergency department complaining of generalized abdominal pain. Her current medications include nifedipine and neostigmine. Her caretaker reports that her bottle of neostigmine is empty but was full earlier in the day. Which of the following findings is likely in this patient?

A 58-year-old woman with a history of myasthenia gravis presents to the emergency department complaining of generalized abdominal pain. Her current medications include nifedipine and neostigmine. Her caretaker reports that her bottle of neostigmine is empty but was full earlier in the day. Which of the following findings is likely in this patient?

A 72-year-old woman with Parkinson's disease is taking a medication that increases release of dopamine, blockade of cholinergic receptors, and inhibiting the N-methyl-D-aspartate receptor. This describes which of the following agents?

In review of the benzodiazepine class, which of the following agents has the longest duration of action and may be useful in the treatment of a 39-year-old patient with spinal cord injury and with skeletal muscle spasticity?

A 45-year-old man with attention-deficit/hyperactivity disorder presents to his primary care physician for evaluation and treatment. Physical examination of the heart, lungs, and abdomen are within normal limits. The patient has begun on atomoxetine. Which of the following underlying disorders must the treating physician be aware of?

A 47-year-old man with seizure disorder presents to his primary care physician for follow-up. Because of a recent exacerbation in his seizures, he is prescribed with lacosamide. Which of the following is the most likely mechanism of action of this medication?