Efficacy and Safety of Ricovir® in Maintaining Durability of Viral Response in Chronic Hepatitis B Patients Who Have Been Treated With Viread® and Have Undetectable HBV DNA in Serum

April 29, 2022 updated by: Mylan (Taiwan) Ltd
This is a phase IV, open label, historical controlled comparative study to evaluate the efficacy and safety of Ricovir® in maintaining durability of viral response in CHB patients who have been treated with Viread® and have undetectable HBV DNA in serum by real-time polymerase chain reaction (PCR) assay.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

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 (Actual)

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.
40

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 4

Contacts and Locations

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

Study Locations

  • Taiwan
      • Taichung, Taiwan, 40705
        • Taichung Veterans General Hospital

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

20 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Ricovir® Group

Inclusion Criteria:

  • Male or female aged more than 20 years old;
  • CHB patients who have been treated with Viread® for more than 1 year;
  • Serum HBV DNA level is undetectable (not detected or <20 IU/mL) at screening;
  • Informed consent must be obtained before the commencement of any screening procedures or study drugs

Exclusion Criteria:

  • Patients with active HCC or other types of malignancy;
  • Patients with impaired renal function (defined as eGFR ≦ 30 mL/min/1.73m2);
  • Patients with hepatitis A (HAV), hepatitis C (HCV), hepatitis D (HDV) or human immunodeficiency virus (HIV) coinfection;
  • Patients with alcohol dependence or addiction;
  • Patients with autoimmune hepatitis;
  • Patients with primary biliary cholangitis (PBC);
  • Pregnancy, planning on getting pregnant, or breast-feeding;
  • History of allergy, hypersensitivity, intolerance, or experiencing severe adverse reactions to tenofovir or any ingredient of the study drug;
  • Not suitable for participating in this trial at the investigator's discretion.

Historical Control Group

Eligible individuals will be obtained from the TCVGH historical database based on matching (1:1) in terms of age (±5 years) and gender. To be eligible for the study, subjects must meet all of the following criteria:

  • Male or female aged more than 20 years old;
  • CHB patients who had been treated with Viread® for more than 1 year;
  • Patients who had discontinued Viread® therapy for at least 24 weeks during the period from January 2014 to December 2021 and had undetectable HBV DNA (not detected or <20 IU/mL) in serum at the time of discontinuation;
  • Patients who have the data of HBV DNA level 24 weeks after the time of discontinuation, with a time window of +4 weeks is allowed;
  • The informed consent requirement will be waived based on the approval of IRB.

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: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

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: Ricovir® group
Drug: Tenofovir disoproxil fumarate
Ricovir® (tenofovir disoproxil fumarate 300 mg) 1 tablet daily. The overall treatment period is 24 weeks.
Other: Historical Control Group
Other: Historical Data
Historical Data

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
Assessment of the rates of virological recurrence of HBV
Time Frame: Week 24
To assess the rates of virological recurrence of HBV at Week 24 with Ricovir® treatment.
Week 24

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
Comparison of the HBV DNA levels between Ricovir® group and historical control group
Time Frame: Week 24
To compare the HBV DNA levels at Week 24 between Ricovir® group and historical control group.
Week 24
Comparison of the rates of virological recurrence of HBV between Ricovir® group and historical control group.
Time Frame: Week 24
To compare the rates of virological recurrence of HBV at Week 24 between Ricovir® group and historical control group.
Week 24
Monitoring of Safety profile for subjects in Ricovir® group
Time Frame: Up to 24 weeks
For subjects in Ricovir® group, physical examination, vital signs, HBV DNA level, and concomitant medications will be evaluated at Week 4, 12 and 24 after treatment. Hematology and clinical biochemistry will be performed every 12 weeks. Adverse events (AEs) will be monitored continuously during the study.
Up to 24 weeks

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.
Mylan (Taiwan) Ltd

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Sanjay Hadigal, Dr., Mylan Pharmaceuticals Private Limited

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 (Actual)

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 21, 2019

Primary Completion (Actual)

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.
July 13, 2021

Study Completion (Actual)

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.
July 13, 2021

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).
April 25, 2022

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.
April 29, 2022

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.
May 2, 2022

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.
May 2, 2022

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.
April 29, 2022

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.
April 1, 2022

More Information

Terms related to this study

Additional Relevant MeSH Terms

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.
  • Mylan-Ricovir-TW-01

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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