One year of methadone maintenance treatment in a fentanyl endemic area: Safety, repeated exposure, retention, and remission.

INTRODUCTION

Fentanyl is a potent synthetic opioid that has contributed to increasing overdose deaths in the United States in recent years. Concern over safety and efficacy of agonist treatment for fentanyl use may limit access to treatment. This study sought to address these potential concerns in a naturalistic setting.

OBJECTIVES

Measure 12-month treatment outcomes for methadone maintenance treatment (MMT) in a fentanyl endemic area.

OUTCOMES

Primary: 1) Treatment retention; 2) sustained remission (defined as 3 consecutive negative screens); 3) return to use; 4) methadone dosage required; and 5) number of days to achieve remission. Secondary: Mortality.

METHODS

A naturalistic follow-up study and retrospective review of consecutive patients newly admitted to a single methadone maintenance treatment program in Rhode Island.

RESULTS

We observed 154 unique intake events (representing 151 patients). Eighty percent (n = 121) tested positive for fentanyl at intake. Seventy-five percent of patients achieved remission within the 12-month study period. One-year retention was 53% for fentanyl-exposed individuals and 47% for those not exposed. The majority (99%) of patients who remained in treatment at 12 months achieved remission. We saw prolonged, sustained remission in 44% of patients exposed to fentanyl at intake and 47% of those who were not. Dose and time to remission were similar. Unfortunately, 4 patients died after leaving MMT prematurely.

CONCLUSIONS

This study suggests MMT is safe despite repeated exposure to fentanyl while taking methadone. Remission is achievable, and MMT is protective against death among fentanyl-exposed patients while in treatment.