👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Pharmacological Therapies🔖 Free to read, print, and share
Also known as: opioids · morphine · narcotics · pain medicine · fentanyl · hydromorphone · Narcan · naloxone
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Use this quick-reference guide to spot, treat, and prevent Opioid Analgesics and Naloxone on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
🧪 Meds
Morphine, hydromorphone, fentanyl
Naloxone = reversal antidote
🩺 Signs
Resp depression, sedation
Pinpoint pupils, ↓ BP, constipation
✅ Do
Monitor RR before + after dose
Bowel regimen, fall precautions
🚩 Report
RR < 12 → hold, naloxone ready
Naloxone short-acting → re-sedation
📚 Opioid Analgesics and Naloxone — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Opioid analgesics (morphine, hydromorphone, fentanyl, oxycodone, codeine) relieve moderate to severe pain by binding opioid receptors in the central nervous system. Their most dangerous adverse effect is respiratory depression. Naloxone (Narcan) is the opioid reversal agent. Memory aid: opioids cause the triad of pinpoint pupils, decreased respirations, and sedation.
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Key points
Understand these first
Respiratory depression is the most serious adverse effect and is the priority assessment before and after dosing.
Classic opioid signs are pinpoint (constricted) pupils, decreased respiratory rate, sedation, and decreased level of consciousness.
Constipation is a near-universal side effect that does not improve with tolerance, so a bowel regimen is standard.
Other effects include nausea, urinary retention, hypotension, and itching.
Naloxone reverses opioid effects but has a shorter duration than many opioids, so repeat dosing and continued monitoring are required.
Naloxone can precipitate acute withdrawal and the abrupt return of severe pain in dependent patients.
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Nursing priorities
What to do, in order
Assess respiratory rate, depth, and oxygen saturation before and after administration; hold the dose for a respiratory rate below 12.
Have naloxone and resuscitation equipment readily available.
Use a sedation scale and a pain scale to titrate safely.
Initiate a bowel regimen with stool softeners and stimulants to prevent constipation.
Implement fall precautions and monitor blood pressure and level of consciousness.
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Red flags — report now
Escalate immediately
Respiratory rate below 12, oxygen desaturation, or increasing sedation requires holding the opioid and considering naloxone.
Unarousable patient with pinpoint pupils and shallow breathing.
After naloxone, watch for re-sedation because the opioid may outlast the antidote.
Severe hypotension or loss of airway protection.
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Patient teaching
What patients must know
Take stool softeners and increase fluids and fiber to prevent constipation.
Do not drink alcohol or take other sedatives with opioids.
Avoid driving or operating machinery until you know how the medication affects you.
❓ Opioid Analgesics and Naloxone: NCLEX FAQs
What are the priority nursing interventions for Opioid Analgesics and Naloxone?
Assess respiratory rate, depth, and oxygen saturation before and after administration; hold the dose for a respiratory rate below 12. Have naloxone and resuscitation equipment readily available. Use a sedation scale and a pain scale to titrate safely. Initiate a bowel regimen with stool softeners and stimulants to prevent constipation.
What are the warning signs of Opioid Analgesics and Naloxone a nurse must report?
Respiratory rate below 12, oxygen desaturation, or increasing sedation requires holding the opioid and considering naloxone. Unarousable patient with pinpoint pupils and shallow breathing. After naloxone, watch for re-sedation because the opioid may outlast the antidote. Severe hypotension or loss of airway protection.
What do I need to know about Opioid Analgesics and Naloxone for the NCLEX?
Respiratory depression is the most serious adverse effect and is the priority assessment before and after dosing. Classic opioid signs are pinpoint (constricted) pupils, decreased respiratory rate, sedation, and decreased level of consciousness. Constipation is a near-universal side effect that does not improve with tolerance, so a bowel regimen is standard. Other effects include nausea, urinary retention, hypotension, and itching.
What patient teaching is important for Opioid Analgesics and Naloxone?
Take stool softeners and increase fluids and fiber to prevent constipation. Do not drink alcohol or take other sedatives with opioids. Avoid driving or operating machinery until you know how the medication affects you.
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Quick Tip
Respiratory depression is the most serious adverse effect and is the priority assessment before and after dosing.