CDI-988 Safety Study in Healthy Participants

NCT ID: NCT05977140

Last Updated: 2025-08-17

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE1

Total Enrollment

116 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-09-27

Study Completion Date

2025-07-23

Brief Summary

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The goal of this clinical trial is to learn about the safety and pharmacokinetics (PK, the amount of drug in the blood) of a new drug called CDI-988 in healthy volunteers.

The main questions it aims to answer are:

* Are there any side effects of the drug?
* What is the amount of drug that reaches the bloodstream? Participants will be assigned by chance to take either CDI-988 or placebo by mouth and have physical exams, electrocardiograms (ECGs), vital signs, and blood tests to look for any side effects.

Detailed Description

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CDI-988 is a severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) 3-chymotrypsin-like (3CL) protease inhibitor for oral administration. This study is being conducted in 2 parts to examine the safety, tolerability, and PK of CDI-988 in healthy participants. Part 1 will entail escalating single doses in sequential cohorts and Part 2 will enroll escalating multiple-dose cohorts. Participants will be monitored for adverse events, vital signs, laboratory values, and electrocardiograms (ECGs).

Conditions

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Healthy Volunteers

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

SEQUENTIAL

Part 1: 5 randomized single ascending dose cohorts of 8 participants and 1 open-label single ascending dose cohort of 6 participants. In Part 2, 6 multiple ascending dose cohorts, each with 8 participants
Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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SAD Cohort 1A

first single-dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

SAD Cohort 1B

second single-dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

SAD Cohort 1C

third single-dose level; food-effect cohort

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

SAD Cohort 1D

fourth single-dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

MAD Cohort 2A

first multiple-dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

MAD Cohort 2B

second multiple-dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

MAD Cohort 2C

third multiple-dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

SAD Cohort 1E

fifth dose level; food effect cohort

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

SAD Cohort 1F

sixth dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

MAD Cohort 2D

4th multiple dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

MAD Cohort 2E

5th multiple dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

MAD Cohort 2F

6th multiple dose level

Group Type EXPERIMENTAL

CDI-988

Intervention Type DRUG

SARS-CoV-2 3CL protease inhibitor

Placebo

Intervention Type DRUG

matching placebo

Interventions

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CDI-988

SARS-CoV-2 3CL protease inhibitor

Intervention Type DRUG

Placebo

matching placebo

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Healthy males or non-pregnant, non-lactating females
* Body weight of at least 45 kg.
* Body mass index ≥18.0 and ≤32.0 kg/m2
* Good state of mental and physical health
* Negative severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) test

Exclusion Criteria

* Received an investigational drug within 30 days
* Received a coronavirus disease 2019 (COVID-19) vaccine within 7 days
* Drug or alcohol abuse in the past 12 months
* Clinically significant abnormal biochemistry, hematology, coagulation, urinalysis test results
* Clinically significant abnormal ECG or vital signs
Minimum Eligible Age

18 Years

Maximum Eligible Age

55 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Cocrystal Pharma Australia Pty Ltd.

UNKNOWN

Sponsor Role collaborator

Beyond Drug Development Pty Ltd.

UNKNOWN

Sponsor Role collaborator

Resolutum Global Pty Ltd.

UNKNOWN

Sponsor Role collaborator

Scientia Clinical Research Pty Ltd

UNKNOWN

Sponsor Role collaborator

Cocrystal Pharma, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Christopher Argent, MD

Role: PRINCIPAL_INVESTIGATOR

Scientia Clinical Research

Locations

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Scientia Clinical Research Pty Ltd

Randwick, New South Wales, Australia

Site Status

Countries

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Australia

Other Identifiers

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CDI-988-P1-001

Identifier Type: -

Identifier Source: org_study_id

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