# Varenicline Observational Investigation In The Cessation of Smoking

> **NCT00669240** · — · COMPLETED · sponsor: **Pfizer** · enrollment: 567 (actual)

## Conditions studied

- Smoking Cessation

## Interventions

- **DRUG:** Varenicline

## Key facts

- **NCT ID:** NCT00669240
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2007-11
- **Primary completion:** 2009-06
- **Final completion:** 2009-08
- **Target enrollment:** 567 (ACTUAL)
- **Last updated:** 2015-07-23


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00669240

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00669240, "Varenicline Observational Investigation In The Cessation of Smoking". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT00669240. Licensed CC0.

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