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Alpha-1 Adrenergic Antagonist

Prazosin pills for Smoking Addiction

Phase 2
Waitlist Available
Led By Bernard Le Foll, PhD
Research Sponsored by Centre for Addiction and Mental Health
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Be between 18 and 65 years old
Timeline
Screening 3 weeks
Treatment Varies
Follow Up up to 5 years
Awards & highlights
All Individual Drugs Already Approved
Approved for 5 Other Conditions

Summary

The most likely outcome of smoking cessation attempts is relapse, underscoring the need to advance novel treatments. Preclinical research shows that the noradrenergic system is critical for modulating drug-seeking behavior and recent findings indicate that the α1-adrenergic antagonist prazosin reduces nicotine self-administration and reinstatement. Presently, data on prazosin's effects on nicotine-related behaviour in humans is lacking. An efficient method for screening novel smoking cessation medications is to integrate human laboratory paradigms in the context of brief, randomized trials of smoking cessation that include smokers motivated to quit. This study aims to provide an initial test of prazosin for smoking cessation by implementing a brief, randomized trial that will include both human laboratory and clinical phenotypes. This approach will allow an efficient but sensitive method for medication screening that maximizes clinical validity.

Eligible Conditions
  • Smoking Addiction

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~up to 5 years
This trial's timeline: 3 weeks for screening, Varies for treatment, and up to 5 years for reporting.

Treatment Details

Awards & Highlights

All Individual Drugs Already Approved
Therapies where all constituent drugs have already been approved are likely to have better-understood side effect profiles.
Approved for 5 Other Conditions
This treatment demonstrated efficacy for 5 other conditions.

Trial Design

2Treatment groups
Active Control
Placebo Group
Group I: Prazosin pillsActive Control1 Intervention
Group II: Sugar pillsPlacebo Group1 Intervention

Find a Location

Who is running the clinical trial?

Ontario Lung AssociationOTHER
19 Previous Clinical Trials
1,135 Total Patients Enrolled
Centre for Addiction and Mental HealthLead Sponsor
372 Previous Clinical Trials
83,347 Total Patients Enrolled
Bernard Le Foll, PhDPrincipal InvestigatorCentre for Addiction and Mental Health
~0 spots leftby Nov 2025