# A nurse is assessing a 28-year-old client admitted to the emergency department with suspected opioid withdrawal. Which assessment finding would be the most significant indicator that the client is experiencing opioid withdrawal syndrome?

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## 문제

A nurse is assessing a 28-year-old client admitted to the emergency department with suspected opioid withdrawal. Which assessment finding would be the most significant indicator that the client is experiencing opioid withdrawal syndrome?

## 보기

1. Constricted pupils and decreased respiratory rate
2. Sedation and confusion with slurred speech
3. Dilated pupils, diaphoresis, and muscle aches with anxiety **✔ 정답**
4. Euphoria and increased appetite with hyperactivity

**정답: 3**

## 해설

Opioid withdrawal presents with autonomic hyperactivity and physical discomfort, opposite to intoxication. Dilated pupils, diaphoresis, muscle aches, and anxiety are key indicators. Other options describe opioid intoxication or unrelated effects.

## 심화 해설

Correct Answer: 3. Dilated pupils, diaphoresis, and muscle aches with anxiety

The clinical presentation of opioid withdrawal syndrome reflects a state of central nervous system and autonomic hyperactivity that occurs when the depressant effects of opioids are abruptly removed. Understanding the underlying pathophysiology helps distinguish withdrawal from acute intoxication or other substance-related syndromes.

Pathophysiology of Opioid Withdrawal

Opioids exert their primary effects by binding to mu-opioid receptors in the brain and spinal cord, leading to the inhibition of adenylyl cyclase and a subsequent decrease in intracellular cyclic adenosine monophosphate (cAMP). With chronic opioid use, neurons adapt by upregulating adenylyl cyclase activity to maintain homeostasis. When the opioid is suddenly discontinued, this compensatory mechanism is unopposed, resulting in a surge of cAMP and a dramatic increase in neuronal firing. This neurochemical rebound manifests as noradrenergic hyperactivity originating from the locus coeruleus, which directly produces the hallmark signs of withdrawal, including dilated pupils (mydriasis), diaphoresis, piloerection, and anxiety. The muscle aches and generalized pain reflect the loss of opioid-mediated analgesia and the heightened sensitivity of pain pathways [1].

Analysis of Answer Choices

The correct option captures the sympathetic nervous system surge that defines acute withdrawal. The other options describe clinical pictures associated with different states on the opioid use spectrum.

| Option | Clinical Picture | Associated State |
| --- | --- | --- |
| 1 | Constricted pupils and decreased respiratory rate | Opioid Intoxication/Overdose: Mu-receptor agonism causes pupillary constriction (pinpoint pupils) and respiratory depression. |
| 2 | Sedation and confusion with slurred speech | Central Nervous System Depression: This presentation is typical of intoxication with opioids, benzodiazepines, or alcohol, not withdrawal. |
| 3 | Dilated pupils, diaphoresis, and muscle aches with anxiety | Opioid Withdrawal: These signs directly result from noradrenergic rebound and loss of analgesic tone. |
| 4 | Euphoria and increased appetite with hyperactivity | Stimulant Intoxication or Hypomania: This does not align with the dysphoric and anxiogenic state of opioid withdrawal. |

Clinical Significance and Assessment Focus

For the NCLEX-RN, recognizing the time course of symptoms is critical. Acute opioid withdrawal, while intensely uncomfortable and debilitating with symptoms such as anxiety, pain, insomnia, and gastrointestinal distress, is typically not life-threatening in an otherwise healthy adult. However, the profound sympathetic activation can lead to significant fluid loss from diaphoresis, vomiting, and diarrhea, making cardiovascular assessment and fluid status monitoring a nursing priority. The assessment finding of dilated pupils with diaphoresis and anxiety provides the most specific clinical indicator for initiating validated withdrawal assessment tools, such as the Clinical Opiate Withdrawal Scale (COWS), which quantifies these objective and subjective signs to guide pharmacologic management [1].References (research sources)

- [1]Adjunctive Management of Opioid Withdrawal with the Nonopioid Medication Cannabidiol.Research articleKudrich C, Hurd YL, Salsitz E, Wang AL. (2022) · DOI: 10.1089/can.2021.0089

## 임상 시나리오

Opioid Withdrawal AssessmentRecognizing Sympathetic Surge
Opioid withdrawal reflects unopposed noradrenergic hyperactivity from the locus coeruleus. Key signs include dilated pupils (mydriasis), diaphoresis, muscle aches, and anxiety.

Differentiate from intoxication: intoxication presents with miosis (constricted pupils), decreased respiratory rate, and sedation. Withdrawal is a hyperactive state.

CautionUse standardized tools like the Clinical Opiate Withdrawal Scale (COWS) for objective assessment. Monitor for severe symptoms like vomiting and diarrhea, which can lead to dehydration and electrolyte imbalance.

## 핵심 개념

- **Opioid Withdrawal Syndrome** — A state of central nervous system and autonomic hyperactivity occurring upon abrupt cessation of opioids, characterized by noradrenergic surge from the locus coeruleus.
- **Mydriasis** — Dilated pupils resulting from unopposed sympathetic nervous system activity during opioid withdrawal.
- **Noradrenergic Hyperactivity** — Increased firing of norepinephrine neurons in the locus coeruleus due to loss of opioid-mediated inhibition, causing withdrawal signs like diaphoresis and anxiety.
- **Locus Coeruleus** — A brainstem nucleus rich in norepinephrine-producing neurons that becomes hyperactive during opioid withdrawal, driving physical symptoms.
- **Mu-opioid Receptors** — Primary binding sites for opioids in the brain and spinal cord that mediate analgesia, euphoria, and respiratory depression.

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