Evaluate the Pharmacokinetics and Safety of MK-4448 in Participants With Nonvalvular Atrial Fibrillation or Atrial Flutter

August 3, 2023 updated by: Portola Pharmaceuticals

A Phase II, Open-label, Dose Exposure Confirmation Study to Evaluate the Pharmacokinetics and Safety and Tolerability of Betrixaban (MK-4448) in Adult Patients With Nonvalvular Atrial Fibrillation or Atrial Flutter

The primary purpose of this study is to optimize drug exposure in the target population.

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.
189

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 2

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • In the opinion of the investigator, participant requires long term anticoagulation for stroke prevention in atrial flutter (AF).
  • Men and women ≥18 years of age.
  • Participant has current non-valvular atrial fibrillation (NVAF) or AF or electrocardiogram (ECG) or Holter documentation within past 12 months.
  • Participant has an international normalized ratio (INR) ≤ 2.2 at allocation (Visit 2).
  • A participant who is of reproductive potential agrees to remain abstinent or use (or have their partner use) 2 acceptable methods of birth control for the duration of the study. Acceptable methods of birth control are: intrauterine device (IUD), diaphragm with spermicide, condom, vasectomy, and hormonal contraception.
  • Participant understands the study procedures and risks involved with the study, and voluntarily agree to participate by giving written informed consent.

Exclusion Criteria:

General

  • Participant is currently participating in another drug study or has received an investigational drug within 30 days prior to enrollment.
  • Participant is a woman who is pregnant, lactating or of child-bearing potential who refuses to use a medically acceptable form of contraception throughout the study.
  • Participant has a body weight less than 40 kg (88 lbs) or greater than 200 kg (440 lbs).
  • Participant routinely consumes more than 2 alcoholic drinks per day (average >14 alcoholic drinks per week) or greater than 5 drinks within 2 hours on occasion.

Prohibited Medical Conditions

  • Participant has any condition or situation which, in the opinion of the investigator, might pose a risk to the participant or interfere with participation in the study.
  • Conditions associated with an increased risk of bleeding Active bleeding.
  • Conditions other than AF that require chronic anticoagulation.
  • Severe aortic and mitral valvular disease requiring surgical intervention.
  • Previous known history of coagulopathy (e.g.: Factor V Leiden, Protein C Deficiency, Protein S Deficiency, Antiphospholipid Syndrome, etc.).
  • Active infective endocarditis.
  • Participant has history of familial long QT interval (the QT interval is the portion of an electrocardiogram (ECG) between the onset of the Q wave and the end of the T wave, representing the total time for ventricular depolarization and repolarization) syndrome or prolonged Bazett-corrected QT interval (QTcB) (males > 470 msec; females >480 msec) at baseline as measured on a 12-lead ECG.
  • Participant has serious pulmonary, hepatic, metabolic, gastrointestinal, central nervous system (CNS) or psychiatric disease, end-stage disease states, or any other disease that could interfere with the conduct or validity of the study or compromise participant safety.
  • Participant has a history of malignancy ≤ 5 years prior to signing informed consent, except for adequately treated basal cell or squamous cell skin cancer or in situ cervical cancer (melanoma, leukemia, lymphoma and myeloproliferative disorders of any duration are excluded).
  • Participant has a history of mental instability, drug/alcohol abuse within the past 5 years, or major psychiatric illness not adequately controlled and stable on pharmacotherapy.
  • Participant has reversible causes of atrial fibrillation (i.e.: cardiac surgery, pulmonary embolism, untreated hyperthyroidism).
  • Participant is to undergo pulmonary vein isolation or surgery for treatment of AF.
  • Participant had a severe, disabling stroke within the previous 6 months, any stroke within the previous 14 days, thromboembolism within previous 30 days or a transient ischemic attack (TIA) within 3 days prior to Visit 1.
  • Participant requires renal replacement therapies (hemo- or peritoneal dialysis).
  • Participant has any of a list of defined laboratory abnormalities.

Prohibited Medications

  • Anti-platelet agents other than aspirin within 10 days prior to Visit 1 (excluding maintenance dose clopidogrel, prasugrel or ticlopidine) or fibrinolytic agents within 30 days prior to Visit 1.
  • Aspirin greater than 162 mg/day.
  • Daily non-steroidal anti-inflammatory drug (NSAID) use.
  • Dronedarone, verapamil or ketoconazole.
  • Vitamin K antagonists (VKA) or other anticoagulants.

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: Amiodarone
Participants on betrixaban 30 mg and concomitant baseline amiodarone
Drug: Amiodarone
Patients on Amiodarone
Drug: Betrixaban 30 mg
Betrixaban 30 mg once a day with food on Day 0 through Day 25 with concomitant amiodarone treatment.
Other Names:
  • MK-4448
Experimental: Betrixaban 60 mg
Participants with lower weights
Drug: Betrixaban 60 mg
Betrixaban 60 mg once a day with food on Day 0 through Day 25
Other Names:
  • MK-4448
Experimental: Betrixaban 90 mg
Participants with higher weights
Drug: Betrixaban 90 mg
Betrixaban 90 mg once a day with food on Day 0 through Day 25
Other Names:
  • MK-4448

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
Steady-state C12 hr on Days 14, 18, and 21 After Weight-based Dosing
Time Frame: Days 14, 18, and 21 of the PK period
Betrixaban PK concentration at 12 hr on Days 14, 18, and 21 in low and high weight groups
Days 14, 18, and 21 of the PK period

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
Steady-state C12 hr on Days 14, 18, and 21 After Weight and Amiodarone-based Dosing
Time Frame: Days 14, 18, and 21 of the PK period
Betrixaban PK concentration at 12 hr on Days 14, 18, and 21 in amiodarone, low and high weight groups
Days 14, 18, and 21 of the PK period

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.
Portola Pharmaceuticals

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

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.
September 1, 2010

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.
December 1, 2010

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.
April 1, 2011

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).
September 9, 2010

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.
October 25, 2010

First Posted (Estimated)

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.
October 27, 2010

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.
August 7, 2023

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.
August 3, 2023

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.
August 1, 2023

More Information

Terms related to this study

Keywords

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.
  • 006-00

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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