# BI 443651 Methacholine Challenge

> **NCT03135899** · PHASE1 · COMPLETED · sponsor: **Boehringer Ingelheim** · enrollment: 37 (actual)

## Conditions studied

- Asthma

## Interventions

- **DRUG:** BI 443651
- **DRUG:** Placebo

## Key facts

- **NCT ID:** NCT03135899
- **Lead sponsor:** Boehringer Ingelheim
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2017-05-18
- **Primary completion:** 2018-02-07
- **Final completion:** 2018-02-21
- **Target enrollment:** 37 (ACTUAL)
- **Last updated:** 2019-11-27


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03135899

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03135899, "BI 443651 Methacholine Challenge". Retrieved via AI Analytics 2026-05-31 from https://api.ai-analytics.org/clinical/NCT03135899. Licensed CC0.

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