Which statement about the duration of naloxone is most accurate?

Which statement about the duration of naloxone is most accurate?

• A. It has a long duration compared to other opioid antagonists
• B. It provides permanent reversal of effects
• C. It does not require titration
• D. It has a short duration of action and repeated dosing may be needed

Answer: (D)

Naloxone’s effect is transient because it is a short-acting opioid receptor antagonist. After administration, it quickly reverses opioid effects, but its own duration is relatively brief—often around an hour or two—while some opioids, especially long-acting ones, stay active longer in the body. Because the opioid effect can outlast naloxone, reversal can wear off and respiratory depression can recur, necessitating additional dosing or a short infusion to maintain reversal until the opioids are cleared. This is why the most accurate statement describes a short duration of action with the need for repeated dosing. Reversal is not permanent, and you must titrate dosing to the patient’s clinical response rather than assume a single dose provides lasting reversal.

Naloxone’s effect is transient because it is a short-acting opioid receptor antagonist. After administration, it quickly reverses opioid effects, but its own duration is relatively brief—often around an hour or two—while some opioids, especially long-acting ones, stay active longer in the body. Because the opioid effect can outlast naloxone, reversal can wear off and respiratory depression can recur, necessitating additional dosing or a short infusion to maintain reversal until the opioids are cleared. This is why the most accurate statement describes a short duration of action with the need for repeated dosing. Reversal is not permanent, and you must titrate dosing to the patient’s clinical response rather than assume a single dose provides lasting reversal.