Relationship Between Methadone Induction Dosing and Retention in Treatment in Opioid Treatment Programs

Area of Science:

• Addiction Medicine
• Pharmacology
• Public Health

Background:

• Opioid use disorder (OUD) treatment with methadone is effective but challenged by early patient dropout.
• Conservative methadone dose titration is recommended, but may prolong withdrawal and increase treatment discontinuation.
• Investigating early dosing strategies is crucial for improving treatment retention.

Purpose of the Study:

• To examine the association between methadone dosage during the first week of treatment and 30-day retention.
• To evaluate if a more rapid dose escalation in early treatment impacts patient adherence.

Main Methods:

• Retrospective cohort study of 14,489 patients across 64 Opioid Treatment Programs (OTPs).
• Excluded patients with initial dose >30 mg or missed doses in the first week.
• Logistic regression analyzed the relationship between day 7 methadone dose and 30-day retention.

Main Results:

• Higher methadone doses on day 7 were significantly linked to improved 30-day retention (P < 0.0001).
• Patients receiving ≥70 mg on day 7 had a 91.24% retention rate versus 79.51% for <30 mg.
• A dose-response relationship was evident: higher day 7 doses correlated with increased retention rates.

Conclusions:

• More rapid methadone induction, especially higher day 7 doses, is associated with better 30-day treatment retention.
• Current conservative induction guidelines may require revision to balance safety and improved outcomes.
• Further research is needed on the effects of induction dosing on mortality and adverse events.