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?

A. Oral candidiasis is not a common adverse effect of metoclopramide. It is more commonly associated with antibiotic use. B. Black stools can indicate gastrointestinal bleeding but are not a typical adverse effect of metoclopramide. C. Dry cough is not associated with metoclopramide. It is more commonly related to respiratory conditions or certain medications like ACE inhibitors. D. Tardive dyskinesia is a serious adverse effect of metoclopramide, especially with long-term or high-dose use. It involves involuntary, repetitive movements and can be irreversible.