Buprenorphine Pharmacokinetics and Clinical Implications

Pharmacokinetic Basis

• Buprenorphine has a long terminal elimination half-life ranging from 24-44 hours, with most clinical studies reporting values in the 24-37 hour range, according to the American College of Emergency Physicians 1

Clinical Implications at 72 Hours

• The onset of withdrawal symptoms from buprenorphine occurs later than short-acting opioids due to its prolonged receptor occupancy, as stated by the American College of Emergency Physicians 1
• Federal regulations allow non-waivered physicians to administer (but not prescribe) buprenorphine for up to 72 hours to treat acute opioid withdrawal in emergency settings, as per the guidelines from the American College of Emergency Physicians 1, 2, and 3