Comparison · NCT02543944-0a07f8c4
Gabapentin vs Placebo: Vivitrol Injection Receivers
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
2 sourcestrial-comparisons-2026-03-23-0.1.0
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ConductScience Library. Gabapentin vs Placebo: Vivitrol Injection Receivers. Trial comparisons, record NCT02543944-0a07f8c4. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT02543944-0a07f8c4
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Measures6
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
| Measure | Value | 95% interval, lower | 95% interval, upper | Method | Note |
|---|---|---|---|---|---|
| Risk in group 1 | 0.364 | 0.222 | 0.534 | wilson | |
| Risk in group 2 | 0.414 | 0.255 | 0.593 | wilson | |
| Risk difference, group 1 minus group 2 | -0.0502 | -0.278 | 0.183 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 0.879 | 0.47 | 1.64 | log | |
| Odds ratio, group 1 over group 2 | 0.81 | 0.291 | 2.25 | log | |
| Number needed to treat, for one fewer participant with the outcome on Gabapentin than on Placebo | 19.9 | from the risk difference interval | the interval includes no difference |
Source ClinicalTrials.gov
Groups2
Group 2 names the comparator: placebo.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code |
|---|---|---|---|---|---|
| Group 1 | Gabapentin | Gabapentin started on day 3 of week 1, increased up to a maximum dose of 800 mg BID by day 3 of week 2 and maintained for 2 weeks followed by 5-day taper.~Buprenorphine (BUP) stabilization up to 12 mg (day 2 of week 1) then a 10-day BUP taper by the end of week 3.~During week 4, detoxed subjects get 0.1 mg of clonidine followed by oral naltrexone (NTX) at 6.25 mg and another 6.25 mg (day 1), 25 mg (day 2) and 50 mg (day 3) then depot NTX injection (later on day 3 or day 4).~Gabapentin: N-type calcium channel blocker being examined for its potential efficacy to alleviate opioid withdrawal during buprenorphine-assisted detox and transition to depot naltrexone.~Buprenorphine: All participants are stabilized on buprenorphine and then undergo a 10 day taper off buprenorphine.~Clonidine: All participants who successfully taper off buprenorphine receive Clonidine (0.1 mg) prior to induction onto oral naltrexone.~Naltrexone (oral): All participants receive increasing doses of oral naltrexone over a 3 day period (day 1: 6.25 and 6.25 mg; day 2: 25 mg; day 3: 50 mg)~Naltrexone (depot): All participants who tolerate oral naltrexone at 50 mg will receive the naltrexone injection on either the same day as the 50 mg dose or the day after. | 12 | 33 | OG000 |
| Group 2 | Placebo | Participants in this arm begin receiving placebo (microcrystalline cellulose) in twice daily capsules on day 3 of week 1 and continue to do so through the beginning of week 5.~Buprenorphine (BUP) stabilization up to 12 mg (day 2 of week 1) then a 10-day BUP taper by the end of week 3.~During week 4, detoxed subjects get 0.1 mg of clonidine followed by oral naltrexone (NTX) at 6.25 mg and another 6.25 mg (day 1), 25 mg (day 2) and 50 mg (day 3) then depot NTX injection (later on day 3 or day 4).~Buprenorphine: All participants are stabilized on buprenorphine and then undergo a 10 day taper off buprenorphine.~Clonidine: All participants who successfully taper off buprenorphine receive Clonidine (0.1 mg) prior to induction onto oral naltrexone.~Naltrexone (oral): All participants receive increasing doses of oral naltrexone over a 3 day period (day 1: 6.25 and 6.25 mg; day 2: 25 mg; day 3: 50 mg)~Naltrexone (depot): All participants who tolerate oral naltrexone at 50 mg will receive the naltrexone injection on either the same day as the 50 mg dose or the day after.~Placebo: Microcrystalline cellulose | 12 | 29 | OG001 |
Source ClinicalTrials.gov
Outcome
- Type
- SECONDARY
- Title
- Vivitrol Injection Receivers
- Description
- % of participants starting the NTX transition who received Vivitrol injection
- Time frame
- 5 days (week 4 day 1 to week 4 day 5)
- Population
Source ClinicalTrials.gov
Trial
- Title
- Improving Treatment Outcomes for Prescription Opioid Dependence
- NCT number
- NCT02543944
- Phases
- PHASE2, PHASE3
- Conditions
- Drug Dependence
- Interventions
- Gabapentin, Buprenorphine, Clonidine, Naltrexone (oral), Naltrexone (depot), Placebo
- Lead sponsor
- University of Arkansas
- Results first posted
- 2022-07-28
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT02543944?tab=results
Source ClinicalTrials.gov
Source
- Release
- trial-comparisons-2026-03-23-0.1.0
- Release manifest SHA-256
- f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57
- AACT copy
- 2026-03-23
- Tables read
- outcome_counts.parquet, outcome_measurements.parquet, outcomes.parquet, reported_event_totals.parquet, reported_events.parquet, result_groups.parquet, studies.parquet, ctgov_trial.parquet
Source ClinicalTrials.gov
Sources 2
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions. The measures are ConductScience's calculation from them.
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