A patient with opioid use disorder is being managed with buprenorphine-naloxone (Suboxone). He presents 6 hours after his last buprenorphine dose with severe withdrawal symptoms. The most likely reason is:

• A Buprenorphine's ceiling effect on analgesia causing undertreated withdrawal
• B Precipitated withdrawal from naloxone displacement of opioids if full agonist opioids were recently used sublingually
• C Buprenorphine's partial agonism providing insufficient receptor activation if he previously had high physical dependence and the drug was administered before adequate withdrawal development ✓
• D Naloxone's hepatic first-pass metabolism being overwhelmed causing systemic opioid antagonism

Explanation

Precipitated withdrawal with buprenorphine occurs when it is administered to a physically opioid-dependent patient before sufficient withdrawal has developed (typically before reaching a COWS score of 8–12). Buprenorphine has very high mu-opioid receptor affinity and will displace full agonists from receptors; as a partial agonist it then provides less intrinsic activity than the full agonist, causing sudden, severe withdrawal. This is why initiation guidelines require the patient to be in mild-to-moderate spontaneous withdrawal before the first dose. The sublingual formulation has minimal systemic naloxone absorption, so option B applies to injection misuse, not standard sublingual use.

Reference: Kaplan & Sadock's Synopsis of Psychiatry, 11th ed.

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Written and medically reviewed by the StethoPrep medical team.