The nurse is evaluating the therapeutic effects of nitroglycerin transdermal patches prescribed to a client 6 months ago. Which of the following statements by the client would indicate that the medication is effective?

A. Blood pressure improvement is not the primary goal for nitroglycerin patches, which are more focused on managing angina. B. While the medication is effective in reducing angina, complete elimination of anginal attacks is not always expected. C. Effective management of angina would be indicated by the client’s ability to tolerate exercise without pain. D. Headaches are a common side effect of nitroglycerin and do not necessarily indicate the effectiveness of the medication in managing angina.