A nurse is caring for a client who is receiving diazepam for moderate (conscious) sedation. Which of the following actions should the nurse take to assess for an adverse reaction to the medication?

The correct answer is A: Monitor the client's oxygen saturation. When a client is receiving diazepam for sedation, respiratory depression is a potential adverse reaction. Monitoring oxygen saturation helps assess the client's respiratory status. This is crucial as diazepam can suppress the respiratory drive, leading to hypoxemia. Monitoring for seizure activity (B) is not directly related to diazepam administration for sedation. Checking urinary output (C) and auscultating bowel sounds (D) are not relevant in assessing adverse reactions to diazepam for sedation.