CI

At a glance

ClinicalIndex Comparison Record
Phase 3Completed· 620 enrolled
Drug / intervention
Iclepertin +1 moredrug
Likely dose
Iclepertin 10 milligramfrom record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04846868
NCT04846868Phase 3Completed

A Phase III Randomized, Double-blind, Placebo-controlled Parallel Group Trial to Examine the Efficacy and Safety of Iclepertin Once Daily Over 26 Week Treatment Period in Patients With Schizophrenia (CONNEX-1)

Boehringer Ingelheim·interventional·Posted Apr 15, 2021·Updated Nov 5, 2025

In Brief

A Phase 3 clinical trial evaluating Iclepertin and Placebo for Schizophrenia. Completed, enrolled 620 participants across 116 sites in 17 countries.

Detailed Summary

This study is open to adults with schizophrenia. Schizophrenia can affect the way a person thinks, their memory and their mental functioning. Examples include struggling to remember things, or to read a book or pay attention to a movie. Some people have difficulty calculating the right change or planning a trip so that they arrive on time. The purpose of this study is to find out whether a medicine called Iclepertin improves learning and memory in people with schizophrenia. Participants are put into two groups randomly, which means by chance. One group takes Iclepertin tablets and the other group takes placebo tablets. Placebo tablets look like Iclepertin tablets but do not contain any medicine. Participants take a tablet once a day for 26 weeks. In addition, all participants take their normal medication for schizophrenia. During this time, doctors regularly test learning and memory of the participants by use of questionnaires, interviews, and computer tests. The results of the mental ability tests are compared between the groups. Participants are in the study for about 8 months and visit the study site about 14 times. During this time, doctors regularly check participants' health and take note of any unwanted effects.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsSchizophrenia
CountriesAustralia, Brazil, Canada, China, Colombia, Germany, Greece, Italy, Japan, Mexico, New Zealand, Norway, Philippines, Poland, Sweden, Turkey (Türkiye), United States
Collaborators--

Timeline

Phase 3CompletedFinished
20222023202420252026
First PostedApr 15, 2021
Enrollment StartSep 8, 2021
Primary CompletionSep 17, 2024
Study CompletionOct 1, 2024
TodayJul 2, 2026
Enrollment to primary: 3.0 yearsPosted 5.2 years ago

Interventions

Iclepertindrug

One 10 milligram (mg) tablet once a day.

Placebodrug

One tablet once a day.