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

Study Overview
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Brief Summary
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To investigate the effect of BI 474121 compared to placebo on ketamine-induced cognitive deficits to predict efficacy in patients with cognitive disorders.

Official Title
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A Randomized, Placebo Controlled, Double-blind, Double-dummy, Three-way Crossover Trial to Investigate the Effect of Two Doses of BI 474121 on Ketamine Induced Cognitive Deficits in Healthy Male Subjects

Conditions
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Healthy

Intervention / Treatment
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* Drug: BI 474121
* Drug: Placebo
* Drug: Ketamine hydrochloride


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy male subjects according to the assessment of the investigator, as based on a complete medical history including a physical examination, vital signs (blood pressure (BP), pulse rate (PR)), 12-lead electrocardiogram (ECG), and clinical laboratory tests Age of 18 to 55 years (inclusive) Body mass index (BMI) of 18.5 to 32 kg/m2 (inclusive) Signed and dated written informed consent(s) prior to admission to the study, in accordance with International Council for Harmonisation-Good Clinical Practice (ICH-GCP) and local legislation prior to admission to the trial If men who are able to father a child, are willing to participate, they have to use an adequate form of effective contraception for the duration of study participation and for at least 30 days after treatment has ended Exclusion Criteria: Any finding in the medical examination (including ECG) deviating from normal and assessed as clinically relevant by the investigator Repeated measurement of systolic blood pressure outside the range of 90 to 140 mmHg, diastolic blood pressure outside the range of 50 to 90 mmHg, or pulse rate outside the range of 50 to 90 bpm evaluated as clinically significant by Investigators Any laboratory value outside the reference range that the investigator considers to be of clinical relevance Any evidence of a concomitant disease assessed as clinically relevant by the investigator Gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal disorders Cholecystectomy or other surgery of the gastrointestinal tract that could interfere with the pharmacokinetics of the trial medication (except appendectomy or simple hernia repair) History of diseases of the central nervous system (including but not limited to any kind of seizures or stroke), and other relevant neurological or psychiatric disorders History of relevant orthostatic hypotension, fainting spells, or blackouts Further exclusion criteria apply.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Treatment sequence T1-T2-R<br>T1: Lower dose of BI 474121 and higher dose of placebo followed by intravenous ketamine infusion T2: Higher dose of BI 474121 and lower dose of placebo followed by intravenous ketamine infusion R: Lower dose of placebo and higher dose of placebo followed by intravenous ketamine infusion | Drug: BI 474121<br>* BI 474121<br>Drug: Placebo<br>* Placebo<br>Drug: Ketamine hydrochloride<br>* Ketamine hydrochloride<br>|
| Experimental: Treatment sequence T2-T1-R<br> | Drug: BI 474121<br>* BI 474121<br>Drug: Placebo<br>* Placebo<br>Drug: Ketamine hydrochloride<br>* Ketamine hydrochloride<br>|
| Experimental: Treatment sequence T1-R-T2<br> | Drug: BI 474121<br>* BI 474121<br>Drug: Placebo<br>* Placebo<br>Drug: Ketamine hydrochloride<br>* Ketamine hydrochloride<br>|
| Experimental: Treatment sequence T2-R-T1<br> | Drug: BI 474121<br>* BI 474121<br>Drug: Placebo<br>* Placebo<br>Drug: Ketamine hydrochloride<br>* Ketamine hydrochloride<br>|
| Experimental: Treatment sequence R-T1-T2<br> | Drug: BI 474121<br>* BI 474121<br>Drug: Placebo<br>* Placebo<br>Drug: Ketamine hydrochloride<br>* Ketamine hydrochloride<br>|
| Experimental: Treatment sequence R-T2-T1<br> | Drug: BI 474121<br>* BI 474121<br>Drug: Placebo<br>* Placebo<br>Drug: Ketamine hydrochloride<br>* Ketamine hydrochloride<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Difference between the total number of errors adjusted for stages that subjects did not complete in the paired associate learning test (PALTEA28), post-ketamine minus the PALTEA28 pre-ketamine |  | up to 22 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Difference between the between errors in the spatial working memory test (SWMBE468), post-ketamine minus the SWMBE468 pre-ketamine |  | up to 22 days | 
| Difference between the Rapid Visual Information Processing test A' (RVPA), post-ketamine minus the RVPA pre-ketamine |  | up to 22 days |