Respiratory rate under 8-12 with deepening sedation is an emergency; give naloxone and call for help.
Before you read
Test yourself first: 5 questions
Question 1 of 5
A client is receiving an opioid for pain after surgery. The nurse keeps which medication readily available as the antidote for opioid-induced respiratory depression?
Answer: B. Naloxone is the opioid antagonist kept available to reverse opioid-induced respiratory depression. Because its duration is shorter than many opioids, repeated doses and continued monitoring for re-sedation are needed.
Question 2 of 5
A nurse is monitoring a client receiving morphine for cancer pain. Which finding is the most concerning sign of opioid toxicity requiring immediate intervention?
Answer: A. Respiratory depression is the most dangerous adverse effect of opioids. A respiratory rate of 6 breaths per minute is a sign of opioid toxicity that requires immediate intervention and possible reversal with naloxone. Constipation, miosis (pinpoint pupils), and mild sedation are common and less urgent than respiratory depression.
Question 3 of 5
A nurse is monitoring a client on a continuous opioid infusion. Which early sign of opioid toxicity should prompt the nurse to act before respiratory depression develops?
Answer: B. Increasing sedation precedes respiratory depression with opioids; a client who is hard to arouse is at high risk. Sedation level is therefore an early warning that should trigger holding the dose and notifying the provider. Hypertension, tachypnea, and dilated pupils are not the early signs; opioids cause pinpoint pupils.
Question 4 of 5
A nurse is preparing to administer an opioid analgesic. Which assessment is MOST important before giving the dose?
Answer: A. Opioids depress the respiratory drive, so the respiratory rate (and sedation level) must be assessed before each dose, and the drug is held for a low rate. Naloxone is the opioid antidote kept available for reversal of respiratory depression.
Question 5 of 5
A nurse is administering an epidural opioid analgesic after surgery. Which complication associated with this route requires close monitoring?
Answer: A. Epidural opioids can migrate and cause delayed respiratory depression, sometimes hours after administration, so respiratory monitoring is essential. Other route-related concerns include urinary retention, pruritus, and hypotension. Hypertension and hyperglycemia are not the characteristic risks of epidural opioids.
Keep the streak going with more questions like these, each with a full rationale.
What is opioid-induced respiratory depression?
It is the most dangerous opioid side effect and is an airway and breathing emergency. Increasing sedation is the earliest warning sign and precedes a falling respiratory rate. Naloxone is the reversal agent.
Key points to remember
- Sedation increases before respiratory rate falls, so monitoring level of consciousness is the key early assessment.
- A respiratory rate under 12, shallow breaths, and falling oxygen saturation indicate respiratory depression.
- Highest risk occurs early in therapy, with dose increases, in the opioid-naive, elderly, obese, or those with sleep apnea.
- Naloxone reverses opioid effects but has a short half-life, so depression can recur and require repeat dosing.
- Combining opioids with benzodiazepines or other CNS depressants multiplies the risk.
- Capnography and continuous pulse oximetry detect depression earlier than spot checks.
Signs & symptoms
- ↓RR, shallow breaths first
- Sedation BEFORE ↓SpO2
- Pinpoint pupils, cyanosis
Nursing priorities
- Assess and document sedation level using a sedation scale along with respiratory rate and depth.
- Stimulate the patient, support the airway, and apply oxygen if breathing slows.
- Hold further opioid doses and notify the provider for significant sedation or a low respiratory rate.
- Administer naloxone per protocol and continue close monitoring because effects can return.
- Keep the head of bed elevated and the patient positioned to maintain a patent airway.
Labs & values
Patient teaching
- Report extreme drowsiness, difficulty staying awake, or slowed breathing to staff immediately.
- Do not combine opioids with alcohol, sleeping pills, or anti-anxiety medications.
- Family should learn the signs of oversedation and how to use take-home naloxone if prescribed.
Red flags: report now
- Respiratory rate under 8-12 with deepening sedation is an emergency; give naloxone and call for help.
- Never leave a heavily sedated patient unmonitored after opioid administration.
- Re-sedation after naloxone wears off requires repeat doses; do not assume one dose is enough.
References
Clinical references for this topic
