# Randomized Study Comparing the Efficacy and Safety of Varenicline Tartrate to Placebo in Smoking Cessation When Subjects Are Allowed to Set Their Own Quit Date

> **NCT00691483** · PHASE4 · COMPLETED · sponsor: **Pfizer** · enrollment: 659 (actual)

## Conditions studied

- Smoking Cessation

## Interventions

- **DRUG:** placebo
- **DRUG:** varenicline

## Key facts

- **NCT ID:** NCT00691483
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2008-09
- **Primary completion:** 2009-09
- **Final completion:** 2009-12
- **Target enrollment:** 659 (ACTUAL)
- **Last updated:** 2015-11-20


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00691483

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00691483, "Randomized Study Comparing the Efficacy and Safety of Varenicline Tartrate to Placebo in Smoking Cessation When Subjects Are Allowed to Set Their Own Quit Date". Retrieved via AI Analytics 2026-06-09 from https://api.ai-analytics.org/clinical/NCT00691483. Licensed CC0.

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