A male client reports to the on-call clinic nurse that he took tadalafil 10 mg by mouth two hours ago and his skin now feels flushed. He reports a history of stable angina but denies experiencing any current or recent chest pain. Which action should the nurse take?

A. Increasing oral fluid intake is not a recommended treatment for skin flushing caused by tadalafil. Skin flushing is a common side effect and usually resolves on its own without the need for increased fluid intake. B. Advising the client to take nitroglycerin is inappropriate and potentially dangerous. Tadalafil and nitroglycerin both lower blood pressure, and their combined use can lead to a significant drop in blood pressure, which can be life-threatening. C. Telling the client to go to the emergency department is unnecessary in this case. Skin flushing is a known side effect of tadalafil and does not typically require emergency medical attention unless accompanied by other severe symptoms. D. Reassuring the client that skin flushing is a common side effect of tadalafil is appropriate. This side effect is generally mild and temporary, and the client should be informed that it is not a cause for concern.