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CompletedNCT04060654Updated Mar 25, 2025Results posted

SUBLOCADE Rapid Initiation Extension Study

A Phase 4 interventional study of Sublocade in Opioid Use Disorder, Severe and Opioid Use Disorder, Moderate, sponsored by Indivior Inc.. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-03-25.

Sponsored by Indivior Inc. · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
17
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

A single center, open-label SUBLOCADE treatment extension study in which up to 25 participants diagnosed with moderate to severe opioid use disorder (OUD) could be enrolled.

Read the detailed description

This study is being conducted to assess the longer-term safety of an abbreviated initiation protocol of SUBLOCADE in subjects who have completed the INDV-6000-403 study. It is also to provide treatment to these individuals while they seek longer-term treatment arrangements, as on average it can take an individual with opioid use disorder (OUD) 6 months between seeking treatment and achieving an appointment at a provider in the United States (US).

Subjects who have completed the end of treatment (EOT) procedures for the INDV-6000-403 study may be eligible for participation. It is planned that the EOT visit for INDV-6000-403, which will occur approximately 28 days after the subject's first dose of SUBLOCADE, and Day 1 for INDV-6000-404 will occur within 2 days of the EOT visit, and that EOT assessments will serve as the screening assessments for this study.

On Day 1, eligible subjects will receive a subcutaneous (SC) injection of 300 mg SUBLOCADE. Subjects will return to the clinic for subsequent injections approximately every 4 weeks for a total of up to 5 injections. Adverse events and concomitant medications will be captured throughout the study, female subjects of childbearing potential will receive urine pregnancy tests and all subjects will have urine drug screening (UDS) and evaluation of the previous injection site performed. Subjects will otherwise be treated in accordance with local standard of care, and SUBLOCADE doses will be based on the medical judgment of the Investigator.

02

Conditions studied

  • Opioid Use Disorder, Severe
  • Opioid Use Disorder, Moderate
03

In context

Opioid-Related Disorders

1,411 studies on the registry are indexed under Opioid-Related Disorders; 290 are open to participants now.

This study's enrollment of 17 is below the median of 63 across 1,123 interventional studies indexed under Opioid-Related Disorders.

Browse Opioid-Related Disorders studies →

Lead sponsor

Indivior Inc. is the lead sponsor of 51 studies on the registry; none are open to participants now.

Of its 14 completed or terminated interventional studies of FDA-regulated products, 11 (79%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Signed the informed consent form (ICF) and have the ability to comply with the requirements and restrictions listed therein.
  • Completed the EOT Visit for the INDV-6000-403 Study.
  • Is an appropriate candidate in the opinion of the Investigator or medically qualified sub-Investigator.

Exclusion criteria

Exclusion Criteria:

  • Subject compliance issues during participation in the INDV-6000-403 study which, in the opinion of the Investigator, could potentially compromise subject safety.
  • Subjects who are unable, in the opinion of the Investigator or Indivior, to comply fully with the study requirements including those who are currently incarcerated or pending incarceration legal action.
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Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
17 participants (actual)

Study arms

  • Experimental
    SUBLOCADE

    All subjects will receive SUBLOCADE 300mg on Day 1, followed by injections every 4 weeks at a dose determined by the Investigator (either 100 mg or 300 mg) for up to 5 total injections

    Drug: Sublocade

Interventions

  • DrugSublocade

    SUBLOCADE to be administered approximately every 4 weeks per local standard of care

    Also known as: Extended release buprenorphine

06

What researchers measure

Primary outcomes

  1. Treatment Emergent Adverse Event (TEAE) Occurrence

    Study will report the number of participants with the occurrence of any TEAE during the treatment period.

    Time frame: From time of informed consent at Day 1 until EOT, assessed up until Day 141

07

Results

Posted Jan 25, 2021
Limitations and caveats
The goal of the study was to assess the longer term safety of an abbreviated initiation protocol of SUBLOCADE and to provide treatment to these individuals while they seek longer term care arrangements. The COVID-19 pandemic, which began during the study period, potentially affected participant's ability to attend clinic visits.

Participant flow

A total of 17 participants who completed the INDV-6000-403 study were screened and enrolled into this extension study.

Participant flow — Overall Study
MilestoneSUBLOCADE
Started17
Completed11
Not completed6
Withdrew: Withdrawal by subject1
Withdrew: Lost to follow-up5

Outcome measures

PrimaryTreatment Emergent Adverse Event (TEAE) Occurrence

Study will report the number of participants with the occurrence of any TEAE during the treatment period.

Time frame:
From time of informed consent at Day 1 until EOT, assessed up until Day 141
Reported as:
Count of participants · Participants
Treatment Emergent Adverse Event (TEAE) Occurrence
ParticipantsSUBLOCADE
Treatment Emergent Adverse Event (TEAE) Occurrence0

Adverse events

Collected over Adverse events were collected from study Day 1 through end of treatment (EOT), up to Day 141. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
SUBLOCADE0/17 (0%)0/17 (0%)0/17 (0%)

Baseline characteristics

Age, Continuous
Age, Continuous(years)SUBLOCADE
Mean40.9 ± 12.68
Age, Customized
Age, Customized(Participants)SUBLOCADE
≥18 to <304
≥30 to <456
≥45 to <605
≥60 to ≤ 652
Sex: Female, Male
Sex: Female, Male(Participants)SUBLOCADE
Female9
Male8
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)SUBLOCADE
Hispanic or Latino0
Not Hispanic or Latino16
Unknown or Not Reported1
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)SUBLOCADE
Asian1
Black or African American5
White10
Other1
Region of Enrollment
Region of Enrollment(participants)SUBLOCADE
United States17
Screening body mass index (BMI)
Screening body mass index (BMI)(kg/m^2)SUBLOCADE
Mean22.81 ± 4.181
Screening BMI Group
Screening BMI Group(Participants)SUBLOCADE
0 to <18.5 (Underweight)2
≥18.5 and <25 (Normal)12
≥25 and <30 (Overweight)1
≥30 (Obesity)2

5 further baseline measures are reported on the registry.

08

Study locations

1 site
  • Hassman Research Institute
    Berlin, New Jersey 08009, United States
09

References and documents

Publications

  • Mariani JJ, Dobbins RL, Heath A, Gray F, Hassman H. Open-label investigation of rapid initiation of extended-release buprenorphine in patients using fentanyl and fentanyl analogs. Am J Addict. 2024 Jan;33(1):8-14. doi: 10.1111/ajad.13484. Epub 2023 Nov 8. PubMed 37936553 ↗

Study documents

  • Study protocol · Dec 4, 2019
  • Statistical analysis plan · Jul 2, 2020

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 25, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04060654
Lead sponsor
Indivior Inc.
Responsible party
Sponsor
First posted
Aug 19, 2019
Start date
Oct 21, 2019
Primary completion
May 15, 2020
Completion
May 15, 2020
Results posted
Jan 25, 2021
Last update
Mar 25, 2025

Study contacts

Michael Hassman
principal investigator · Hassman Research Institute

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2025. You cannot join it, but the record below documents what was studied.

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