A nurse is monitoring a client who is receiving diazepam for moderate sedation. The nurse should monitor the client for which of the following adverse effects?

Diazepam is a long-acting benzodiazepine that enhances the inhibitory effect of gamma-aminobutyric acid (GABA) within the central nervous system. It is utilized for procedural sedation to induce anxiolysis and amnesia. Its primary safety concern involves dose-dependent depression of the medullary respiratory centers. Rationale: A. Fever is not a recognized adverse effect of diazepam administration. Benzodiazepines typically do not interfere with the hypothalamic thermoregulatory center to cause an elevation in body temperature. If a client develops a fever during sedation, the nurse should investigate other causes such as an underlying infection or a reaction to a different pharmacological agent. B. Respiratory depression is the most critical adverse effect to monitor during diazepam administration for moderate sedation. As a central nervous system depressant, diazepam can significantly decrease the respiratory rate and tidal volume, leading to hypoxia or apnea. The nurse must continuously monitor oxygen saturation and capnography to ensure the patient maintains adequate spontaneous ventilation and airway patency. C. Hypertension is unlikely to occur with diazepam; rather, the drug often causes a slight decrease in blood pressure due to reduced anxiety and systemic vasodilation. Benzodiazepines do not stimulate the sympathetic nervous system. Monitoring for hypotension and bradycardia is more appropriate when assessing the hemodynamic stability of a client undergoing moderate sedation with this agent. D. Hyperreflexia is an exaggerated reflex response that is inconsistent with the pharmacological profile of benzodiazepines. Diazepam acts as a muscle relaxant and anxiolytic, which typically results in diminished or normal reflexes. Hyperreflexia is more commonly associated with upper motor neuron lesions or certain drug withdrawal states rather than acute sedation with GABAergic medications.