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?

“I can tell that my blood pressure has been better every day.”

“I have had no anginal attacks since starting the medication.”

“I am tolerating exercise without pain on a regular basis.”

“I have not had as many headaches since starting the medication.”