Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: Varenicline for the Treatment of Smokeless Tobacco Use
Brief Summary: Varenicline (Chantix™, Pfizer) is a novel selective nicotinic receptor partial agonist with specificity for the α4β2 nicotine acetylcholine receptor that has demonstrated remarkable efficacy for increasing long-term tobacco abstinence rates in cigarette smokers. The novel mechanism of action of varenicline potentially circumvents the limitations of using nicotine replacement therapy or bupropion pharmacotherapy in ST users. The overall goal of this line of research is to develop effective pharmacologic treatments for ST users to increase long-term (≥ 6 months) abstinence rates. The central hypothesis of this application is that varenicline is efficacious for the treatment of ST users.


Options:
A: Arm Label: study groups; Type: ACTIVE_COMPARATOR; Interventions: Drug: Varenicline | Arm Label: control group; Type: PLACEBO_COMPARATOR; Interventions: Drug: placebo | Intervention Type: DRUG; Name: Varenicline; Assigned to Arm(s): study groups | Intervention Type: DRUG; Name: placebo; Assigned to Arm(s): control group
B: Arm Label: varenicline; Type: ACTIVE_COMPARATOR; Interventions: Drug: varenicline | Arm Label: Placebo; Type: PLACEBO_COMPARATOR; Interventions: Drug: placebo | Intervention Type: DRUG; Name: varenicline; Assigned to Arm(s): varenicline | Intervention Type: DRUG; Name: placebo; Assigned to Arm(s): Placebo
C: Arm Label: Bupropion SR + Contingency Management; Type: EXPERIMENTAL; Interventions: Drug: Bupropion SR, Behavioral: Contingency Management | Arm Label: Placebo + Contingency Management; Type: ACTIVE_COMPARATOR; Interventions: Behavioral: Contingency Management, Other: Placebo | Arm Label: Bupropion SR + No Contingency Management; Type: ACTIVE_COMPARATOR; Interventions: Drug: Bupropion SR | Arm Label: Placebo + No Contingency Management; Type: PLACEBO_COMPARATOR; Interventions: Other: Placebo | Intervention Type: DRUG; Name: Bupropion SR; Assigned to Arm(s): Bupropion SR + Contingency Management, Bupropion SR + No Contingency Management | Intervention Type: BEHAVIORAL; Name: Contingency Management; Assigned to Arm(s): Bupropion SR + Contingency Management, Placebo + Contingency Management | Intervention Type: OTHER; Name: Placebo; Assigned to Arm(s): Placebo + Contingency Management, Placebo + No Contingency Management
D: Arm Label: patch; Type: ACTIVE_COMPARATOR; Interventions: Drug: nicotine patch | Arm Label: nicotine lozenge; Type: ACTIVE_COMPARATOR; Interventions: Drug: nicotine lozenge | Arm Label: bupropion; Type: ACTIVE_COMPARATOR; Interventions: Drug: bupropion | Arm Label: patch + lozenge; Type: ACTIVE_COMPARATOR; Interventions: Drug: patch + lozenge | Arm Label: buproion + lozenge; Type: ACTIVE_COMPARATOR; Interventions: Drug: bupropion + lozenge | Intervention Type: DRUG; Name: nicotine patch; Assigned to Arm(s): patch | Intervention Type: DRUG; Name: nicotine patch; Assigned to Arm(s): patch | Intervention Type: DRUG; Name: nicotine lozenge; Assigned to Arm(s): nicotine lozenge | Intervention Type: DRUG; Name: bupropion; Assigned to Arm(s): bupropion | Intervention Type: DRUG; Name: patch + lozenge; Assigned to Arm(s): patch + lozenge | Intervention Type: DRUG; Name: bupropion + lozenge; Assigned to Arm(s): buproion + lozenge

Answer: B