The client is receiving fentanyl transdermal patch 25 mcg/hr. Which nursing intervention is most important for the nurse to initiate?

Rationale: A. Auscultate the client’s bowel sounds: Opioids like fentanyl can slow gastrointestinal motility and contribute to constipation or ileus. While bowel assessment is important in long-term management, it is not the priority concern for immediate safety with fentanyl therapy. B. Record the client’s urinary output: Opioids may cause urinary retention, especially in older adults. However, monitoring urinary output is secondary to ensuring that the client’s respiratory and neurological status remain stable while using a potent opioid. C. Assess the client’s level of consciousness (LOC): Fentanyl is a strong opioid analgesic with a high risk of respiratory depression and central nervous system sedation. Monitoring the client’s LOC provides the earliest indication of opioid toxicity. D. Observe the client’s mucous membranes: Checking mucous membranes helps assess hydration and oxygenation, but it does not directly address the life-threatening complication of fentanyl use. Ensuring the client maintains adequate consciousness and respiratory function is the priority.