A nurse is reinforcing teaching about transdermal nitroglycerin (nitro-dur) to a client who has stable angina. Which of the following statements by the client indicates that teaching has been effective?
1) The patch should be applied to the same spot every day.
2) I should remove the patch before taking a shower.
3) I can apply the patch to any area of my body.
4) I should change the patch every 24 hours.