Detoxification from methadone maintenance: double-blind comparison of two methods.

Area of Science:

• Addiction Medicine
• Pharmacology
• Clinical Research

Background:

• Methadone maintenance therapy is a cornerstone of opioid use disorder treatment.
• Detoxification from methadone can be challenging, with various methods employed.
• Standard methadone withdrawal often involves gradual dose reduction.

Purpose of the Study:

• To compare the efficacy of two ambulatory, double-blind detoxification protocols for methadone maintenance patients.
• To evaluate a methadone tapering combined with propoxyphene napsylate (M--PN) regimen against a methadone-only tapering regimen (M--M).

Main Methods:

• A total of 22 well-rehabilitated methadone maintenance patients participated.
• Patients were randomized into two groups over 42 days: M--PN (methadone taper supplemented with propoxyphene napsylate) or M--M (methadone taper with methadone administered twice daily).
• The study employed ambulatory and double-blind conditions.

Main Results:

• All 12 patients in the M--M group successfully withdrew from methadone maintenance.
• 5 out of 10 patients (50%) in the M--PN group achieved temporary withdrawal, with two requiring continued propoxyphene napsylate maintenance.
• Both M--M and M--PN methods demonstrated superiority over standard step-wise methadone dose reduction.

Conclusions:

• The methadone-to-methadone (M--M) detoxification protocol appears more effective than the methadone-to-propoxyphene napsylate (M--PN) protocol for methadone withdrawal.
• Ambulatory, double-blind detoxification methods offer promising alternatives to standard methadone tapering.
• Further research into optimized detoxification strategies for opioid use disorder is warranted.