A nurse is caring for a client who received epidural anesthesia during hip surgery. Which of the following manifestations should the nurse monitor as an adverse reaction?

A. Rapid rise in temperature: A sudden increase in body temperature is not associated with epidural anesthesia. This symptom is more characteristic of malignant hyperthermia, which occurs with certain general anesthetics, not regional anesthesia. B. Hypertension: Epidural anesthesia typically causes vasodilation and hypotension rather than hypertension. Monitoring for a drop in blood pressure is more appropriate following this procedure. C. Tachycardia: While mild tachycardia may occur as a compensatory response to hypotension, it is not a primary adverse effect of epidural anesthesia and usually resolves with fluid or position changes. D. Severe headache: A severe headache can occur if cerebrospinal fluid leaks due to accidental dural puncture during epidural insertion. This post-dural puncture headache is a known adverse effect requiring monitoring and may necessitate interventions such as a blood patch.