Naltrexone initiation requires the patient to be opiate-free for how long?

Naltrexone initiation requires the patient to be opiate-free for how long?

• A. 3 days
• B. 48 hours
• C. 2 weeks
• D. 7-10 days

Answer: (D)

Naltrexone is an opioid receptor antagonist, so giving it while opioids are still in the body can abruptly displace them and trigger withdrawal. To avoid precipitated withdrawal, the patient must be opioid-free long enough for the substances to clear from the system. For most patients, that washout period is about 7–10 days after the last opioid use, which allows withdrawal symptoms to resolve and ensures no opioid remains to be displaced. Shorter gaps (like 3 days or 48 hours) risk precipitated withdrawal, while a period as long as 2 weeks isn’t typically necessary for standard cases. If long-acting opioids such as methadone have been used, longer abstinence may be needed, but the common initiation window used in practice is 7–10 days. Once the patient is fully opioid-free, naltrexone can be started with monitoring for withdrawal or cravings.

Naltrexone is an opioid receptor antagonist, so giving it while opioids are still in the body can abruptly displace them and trigger withdrawal. To avoid precipitated withdrawal, the patient must be opioid-free long enough for the substances to clear from the system. For most patients, that washout period is about 7–10 days after the last opioid use, which allows withdrawal symptoms to resolve and ensures no opioid remains to be displaced. Shorter gaps (like 3 days or 48 hours) risk precipitated withdrawal, while a period as long as 2 weeks isn’t typically necessary for standard cases. If long-acting opioids such as methadone have been used, longer abstinence may be needed, but the common initiation window used in practice is 7–10 days. Once the patient is fully opioid-free, naltrexone can be started with monitoring for withdrawal or cravings.