QT Interval Effects Study of Oral FXS5626 Tablets

July 6, 2026 updated by: Shanghai Fosun Pharmaceutical Industrial Development Co. Ltd.

A Single-Center, Double-Blind, Placebo-Controlled, Dose-Escalating Clinical Trial to Evaluate the Safety, Tolerability, Pharmacokinetics, and QT Interval Effects of Oral FXS5626 Tablets in Healthy Chinese Participants

The purpose of this study is to evaluate the Exposure-Response Relationship Between the Plasma Drug Concentrations and the Change From Baseline in QTc interval of a single oral dose of FXS5626 in healthy subjects.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
28

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • China
    • Beijing Municipality
      • Beijing, Beijing Municipality, China, 100730

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria：

  1. Healthy, adult, male or female,18-45 years of age (inclusive), with a Body Mass Index (BMI) of 19.0-28.0 kg/m2 (inclusive),have a minimum weight of at least 50kg(male) or 45kg(female).
  2. Medically healthy with no clinically significant medical history, physical examination,laboratory profiles, vital signs or ECG abnormalities , as deemed by the PI or designee.
  3. Understands the study procedures in the informed consent form (ICF), and be willing and able to comply with the protocol.
  4. Female subjects of childbearing potential and male subjects with a partner of childbearing potential who voluntarily signed ICF should be no fertile, sperm/egg donation for 3 months from the beginning to the last dose, and voluntary use highly effective contraception (including partner) (non-drug contraception is required during the trial).

Exclusive Criteria:

  1. Female subjects who are pregnant,or breastfeeding,or with a positive pregnancy test
  2. Allergic constitutions (such as allergies to two or more drugs, foods, and pollen), or determined by the investigator, may be allergic to the investigational product or any component of the investigational product.
  3. Subjects with a prior or present history of clinically abnormal metabolic, liver, kidney, hematological, pulmonary, cardiovascular, gastrointestinal, urinary, endocrine, neurological, or psychiatric disease who were judged by the investigator to be unsuitable for participation in this study.
  4. Subjects who have a history of other risk factors for tachycardia, or a family history of a first-degree relative (i.e. biological parent, sibling, or child) of short QT syndrome, long QT syndrome, or sudden unexplained death in young age (≤40 years).
  5. Significant screening ECG abnormalities,QTcF interval > 450ms (Fridericia's correction), or QRS>120ms,or PR interval >=210ms or <=120ms
  6. Subjects who have got severe infections within 2 months before screening; Or have a history of active bacterial infection or viral infection or fungal infection within 2 weeks before screening
  7. Subjects virus serological test (hepatitis B virus surface antigen, hepatitis C virus antibody, human immunodeficiency virus antibody, treponema pallidum specific antibody TPPA) positive results.
  8. Subjects with a history of drug abuse,or who screened positive for drug abuse.
  9. Subjects who consumed more than 14 units of alcohol per week in the 6 months prior before screening (1 unit of alcohol =360mL beer or 45mL spirits with 40% alcohol or 150mL wine) or had a positive alcohol breath test or could not abstain during the trial.
  10. Subjects who smoked more than 5 cigarettes per day in the 6 months prior before screening or could not give up during the trial.
  11. Subjects who have abnormal laboratory test: neutrophil count<1.5 x10^9/L,or white blood cell count<3.5 x10^9/L,or creatine kinase greater than the upper limit of normal at screening.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: FXS5626
FXS5626 75mg、250mg、400mg; single dose, oral
Drug: FXS5626 tablet
FXS5626 75mg、250mg、400mg, single dose, oral
Placebo Comparator: Placebo
single dose, oral
Drug: Placebo tablet
single dose, oral

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Effect on QTcF between baseline and post-dose treatment of FXS5626
Time Frame: 45 min before administration and 24 hours after administration
The Cmax geometric mean corresponds to the upper 90% bilateral confidence interval of ΔΔQTcF
45 min before administration and 24 hours after administration
To access the incidence and severity of adverse events (AEs), serious AEs and abnormalities on laboratory tests [Safety and Tolerability] of single ascending oral dose of FXS5626 in healthy adults.
Time Frame: Approximately 1 week
The incidence and severity of adverse events (AEs) , serious AEs and abnormalities on laboratory tests
Approximately 1 week

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Plasma concentration and pharmacokinetic parameters
Time Frame: 10 min before administration and 48 hours after administration
Cmax
10 min before administration and 48 hours after administration

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Shanghai Fosun Pharmaceutical Industrial Development Co. Ltd.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 5, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 25, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 25, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 6, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 6, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 10, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 10, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 6, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • FXS5626-104

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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