A nurse is caring for a client who is receiving high-dose metoclopramide. The nurse should monitor the client for which of the following adverse effects?

The correct answer is B: Tardive dyskinesia. Metoclopramide is known to cause tardive dyskinesia, a serious movement disorder characterized by involuntary repetitive movements. This adverse effect is associated with long-term use of high doses of metoclopramide. Dry cough (A) is not a common adverse effect of metoclopramide. Oral candidiasis (C) is not directly associated with metoclopramide use. Black stools (D) are not a typical adverse effect of metoclopramide and would be more concerning for gastrointestinal bleeding. Thus, the nurse should primarily monitor for tardive dyskinesia in a client receiving high-dose metoclopramide.