Final answer:
The client should come into the clinic for an evaluation considering their history of myocardial infarction and the possibility of a cardiac issue related to the cough. Over-the-counter suppressants are not recommended without a doctor's advice, particularly in clients with a history of lung or heart conditions.
Step-by-step explanation:
If a client with a history of myocardial infarction reports the onset of a cough that is troublesome at night, the most appropriate direction for the nurse to give would be: "Please come into the clinic for an evaluation." This is because the cough could be a sign of a new or worsening cardiac condition, such as heart failure, especially given the client's medical history, and it should be evaluated by a healthcare provider.
From the case studies provided, it is important to remember that a cough can be a symptom of various health issues from bronchitis to serious infections, and in individuals with a background of heart problems, it is critical not to disregard it. The option of using a cough suppressant is generally not recommended for individuals with bronchitis or other underlying infections as seen in the case of Sacheen, where it's advised not to take over-the-counter cough suppressant medication. Instead, a medical evaluation can help to determine the underlying cause of the cough and guide appropriate treatment.