The client presents to the emergency department with a headache in the back of the head, diaphoresis, and neck stiffness. The client's blood pressure measures 180/124 mm Hg and heart rate is 168 beats/min. The spouse says the client is currently prescribed 'something for depression' and denies any history of cardiac disease. The nurse should suspect the use of what medication?

The correct answer is A: A monoamine oxidase inhibitor (MAOI). MAOIs can cause a dangerous hypertensive crisis when taken with foods or medications containing tyramine. The client's symptoms of headache, diaphoresis, neck stiffness, and high blood pressure are consistent with a hypertensive crisis. MAOIs are known to interact with sympathomimetic drugs, leading to increased blood pressure and heart rate. SSRI, TCA, and atypical antipsychotics do not typically cause these symptoms or interact with tyramine in the same way as MAOIs. Therefore, the nurse should suspect the use of an MAOI in this case.