Alcohol Use Disorder Clinical Trial
Official title:
A Randomized, Double-blind, Placebo-controlled Multicenter Trial on the Efficacy of Varenicline and Bupropion in Combination and Alone, for Treatment of Alcohol Use Disorder
The COMB study is a randomized double-blind placebo-controlled multicenter trial in Sweden on the efficacy of varenicline and bupropion, in combination and alone, for treatment of alcohol use disorder (AUD). Study design overview: A 13-weeks (91 days) multicenter clinical trial with four parallel groups. 95 subjects per treatment arm will be randomized into the study. 380 subjects with AUD will be randomized in total.
Varenicline (Champix®) and bupropion (Zyban®, patent time expired) are approved and marketed in Europe and US for smoking cessation in nicotine use disorder, and for treatment of major depression (bupropion). There is clinical evidence of an additive effect of the drug combination of varenicline and bupropion on smoking cessation. Varenicline has been shown in two RCTs to reduce also alcohol intake in subjects with AUD. It is hypothesized that bupropion will enhance the effect of varenicline and that the combined effect size will be greater than that of approved therapies for AUD. As efficacy endpoint, the trial uses the alcohol specific biomarker for alcohol intake, phosphatidylethanol in blood (B-PEth). Outcome will also be measured by self-reported alcohol consumption, the standard effect measure in AUD trials.This will be the first trial using the biomarker B-PEth as primary outcome variable. The use of a specific objective marker is expected to increase chances for detecting treatment effects. Development phase: II Number of randomized subjects: 380 subjects with AUD. 95 subjects per treatment arm will be randomized into the study. Number of sites: Approximately 5 study sites in Sweden Investigational medicinal products, dosages and administration: There will be two separate study kits for IMP 1 and IMP 2 Investigational medicinal product 1 (IMP1): Varenicline 1 mg x 2 p.o. daily. The pharmaceutical formulation will be encapsulated tablets for oral use. Varenicline will be escalated from 0.5 to 2 mg daily during the first week. Investigational medicinal product 2 (IMP 2): Bupropion SR 150 mg x 2 p.o. daily. The pharmaceutical formulation will be encapsulated sustained release (SR) tablets for oral use. Bupropion will be escalated from 150 to 300 mg daily during the first week. IMP 1 and IMP 2 are distributed at 7 occasions: Day 0, Day 7, Day 21, Day 35, Day 49, Day 63 and Day 77. The doses and route of administration for varenicline and bupropion are those approved and recommended as oral formulations for smoking cessation. The trial comprises 9 study visits over 91 days: Screening visit,Day 0, Day 7, Day 21, Day 35, Day 49, Day 63, Day 77 and Day 91. Randomization is carried out according to block randomization and eligible subjects are randomized to one of the below described intervention arms. The study will be performed in accordance with the study protocol, with the latest version of the Declaration of Helsinki, in accordance with GCP principles (ICH-GCP E6-R2), and applicable regulatory requirements in Sweden . The study is approved by competent authority (the Swedish Medical Product Agency) and the Etics committee. The trial is monitored by an independent monitor according to GCP principles. ;
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