# Trial Comparing Tiotropium Inhalation Capsules vs Placebo in Chronic Obstructive Pulmonary Disease (COPD).

> **NCT00523991** · PHASE4 · COMPLETED · sponsor: **Boehringer Ingelheim** · enrollment: 457 (actual)

## Conditions studied

- Pulmonary Disease, Chronic Obstructive

## Interventions

- **DRUG:** tiotropium
- **DRUG:** Placebo

## Key facts

- **NCT ID:** NCT00523991
- **Lead sponsor:** Boehringer Ingelheim
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2007-04
- **Primary completion:** 2010-07
- **Final completion:** —
- **Target enrollment:** 457 (ACTUAL)
- **Last updated:** 2014-05-20

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00523991

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00523991, "Trial Comparing Tiotropium Inhalation Capsules vs Placebo in Chronic Obstructive Pulmonary Disease (COPD).". Retrieved via AI Analytics 2026-06-03 from https://api.ai-analytics.org/clinical/NCT00523991. Licensed CC0.

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