# A Study in Healthy Men to Test Whether BI 474121 Can Reverse the Memory Problems Caused by Ketamine

> **NCT05451095** · PHASE1 · WITHDRAWN · sponsor: **Boehringer Ingelheim**

## Conditions studied

- Healthy

## Interventions

- **DRUG:** BI 474121
- **DRUG:** Placebo
- **DRUG:** Ketamine hydrochloride

## Key facts

- **NCT ID:** NCT05451095
- **Lead sponsor:** Boehringer Ingelheim
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2022-11-07
- **Primary completion:** 2023-06-05
- **Final completion:** 2023-06-20
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Termination of project
- **Last updated:** 2022-08-01


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05451095

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05451095, "A Study in Healthy Men to Test Whether BI 474121 Can Reverse the Memory Problems Caused by Ketamine". Retrieved via AI Analytics 2026-06-03 from https://api.ai-analytics.org/clinical/NCT05451095. Licensed CC0.

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