NCT03752528

Evaluation of Long-term Buprenorphine Plasma Exposure

Evaluation of Long-term Buprenorphine Plasma Exposure in Subjects Who Received at Least 2 Subcutaneous (SC) Injections of Extended-release Buprenorphine (SUBLOCADE™) in Phase III Studies

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 53 (actual)
• Sponsor: Indivior Inc. · Industry
• Sex: All
• Age: —
• Healthy volunteers: Not accepted

Summary

The study objective is to characterise the long-term plasma exposure to buprenorphine after stopping SUBLOCADE treatment. There are no interventions planned. This multicentre investigation will enroll participants from Study RB-US-13-0003 (NCT02510014) or both Studies RB-US-13-0003 and INDV-6000-301 (NCT02896296) and who received at least 2 subcutaneous (SC) injections of SUBLOCADE. There are two parts to the study: Part A consists of a single visit during which urine samples are collected to measure free buprenorphine and free norbuprenorphine concentrations; qualitative urine drug samples (UDS) for opioids, including buprenorphine; quantitative UDS for buprenorphine, norbuprenorphine and naloxone; and determination of creatinine concentration. Blood samples are collected for the determination of buprenorphine and norbuprenorphine plasma concentrations. Results on the quantitative UDS performed in Part A determine enrollment in Part B: participants who provide a quantifiable (i.e., positive) result for buprenorphine and/or norbuprenorphine and a non-quantifiable (i.e., negative) result for naloxone meet continuation criteria to move on to Part B if Part B is still open to enrolment. Part B consists of two visits 30 days apart in which the same tests are run as were done in Part A.

Detailed description

Data indicate that after discontinuing SUBLOCADE patients may have detectable concentrations of buprenorphine in plasma and urine for 12 months or longer. Previous Phase II/III studies did not evaluate the pharmacokinetics (PK) of buprenorphine beyond 2 months after the last injection; this study will characterize the long-term plasma exposure starting at least 12 months after the last injection. The study will also assess relationships between plasma drug concentrations, free drug concentrations in urine and urine drug screen (UDS) results in order to provide refined guidance to patients and physicians with respect to long-term exposure to buprenorphine after stopping SUBLOCADE treatment.

Conditions

• Opioid-use Disorder

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	Blood sample collection	Determination of buprenorphine and norbuprenorphine plasma concentrations
DIAGNOSTIC_TEST	Urine sample collection	Urine sample for determination of free buprenorphine and free norbuprenorphine concentrations, qualitative UDS for opioids, quantitative UDS for buprenorphine, norbuprenorphine and naloxone, and determination of creatinine concentration

Timeline

• Start date: 2019-02-19
• Primary completion: 2019-07-18
• Completion: 2019-07-18
• First posted: 2018-11-26
• Last updated: 2020-08-21
• Results posted: 2020-08-03

Locations

11 sites across 1 country: United States