Effects of VX-407 on the Pharmacokinetics of Combined Oral Contraceptives

August 25, 2026 updated by: Vertex Pharmaceuticals Incorporated

A Phase 1, Open-label Drug Interaction Study to Evaluate the Effect of VX-407 on the Pharmacokinetics of Combined Oral Contraceptives

The purpose of the study is to evaluate the pharmacokinetic effects and safety and tolerability of VX-407 when coadministered with oral contraceptives.

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.

Detailed Description

The purpose of the study is to evaluate the pharmacokinetic effects and safety and tolerability of VX-407 when coadministered with oral contraceptives. This clinical trial information was submitted voluntarily under the applicable law and, therefore, certain submission deadlines may not apply. (That is, clinical trial information for this applicable clinical trial was submitted under section 402(j)(4)(A) of the Public Health Service Act and 42 CFR 11.60 and is not subject to the deadlines established by sections 402(j)(2) and (3) of the Public Health Service Act or 42 CFR 11.24 and 11.44.).

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.
148

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.

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

Key Inclusion Criteria:

  • Body mass index (BMI) of 18.0 to 30.0 kilogram per meter square (kg/m^2), inclusive
  • A total body weight of greater than (>) 50 kg

Key Exclusion Criteria:

  • History of febrile illness within 5 days before the first dose of study drug
  • Pregnant, nursing, or planning to become pregnant during the study or within 90 days after the last dose of study drug

Other protocol defined Inclusion/Exclusion criteria will apply.

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: Sequential 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: Part A: VX-407 With Levonorgestrel/Ethinyl Estradiol (LNG/EE)
Participants will receive a single dose of LNG/EE on Days 1 and 21 in fasted state. Participants will also receive VX-407 every 12 hours (q12h) from Days 8 through 26 in fasted state.
Drug: LNG/EE
Combination Tablets for Oral Administration.
Drug: VX-407
Tablets for Oral Administration.
Experimental: Part B (Optional): VX-407 With Norgestimate/Ethinyl Estradiol (NGM/EE)
Participants will receive a single dose of NGM/EE on Days 1 and 23 in fasted state. Participants will also receive VX-407 q12h from Days 10 through 30 in fasted state.
Drug: NGM/EE
Combination Tablets for Oral Administration.
Drug: VX-407
Tablets for Oral Administration.
Experimental: Part C (Optional): VX-407 With Norethindrone/Ethinyl Estradiol (NET/EE)
Participants will receive a single dose of NET/EE on Days 1 and 19 in fasted state. Participants will also receive VX-407 q12h from Days 6 through 22 in fasted state.
Drug: NET/EE
Combination Tablets for Oral Administration.
Drug: VX-407
Tablets for Oral Administration.
Experimental: Part D (Optional): VX-407 With Drospirenone/Ethinyl Estradiol (DRSP/EE)
Participants will receive a single dose of DRSP/EE on Days 1 and 21 in fasted state. Participants will also receive VX-407 q12h from Days 8 through 26 in fasted state.
Drug: DRSP/EE
Combination Tablets for Oral Administration.
Drug: VX-407
Tablets for Oral Administration.

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
Time Frame
Part A: Maximum Observed Plasma Concentration (Cmax) of LNG/EE in the Absence and Presence of VX-407
Time Frame: From Day 1 up to Day 7 and Day 21 up to Day 27
From Day 1 up to Day 7 and Day 21 up to Day 27
Part B (Optional): Maximum Observed Plasma Concentration (Cmax) of norelgestromin (NGMN) and norgestrel (NG) (active metabolites of NGM) and EE in the Absence and Presence of VX-407
Time Frame: From Day 1 up to Day 9 and Day 23 up to Day 31
From Day 1 up to Day 9 and Day 23 up to Day 31
Part C (Optional): Maximum Observed Plasma Concentration (Cmax) of NET and EE in the Absence and Presence of VX-407
Time Frame: From Day 1 up to Day 5 and Day 19 up to Day 23
From Day 1 up to Day 5 and Day 19 up to Day 23
Part D (Optional): Maximum Observed Plasma Concentration (Cmax) of DRSP and EE in the Absence and Presence of VX-407
Time Frame: From Day 1 up to Day 7 and Day 21 up to Day 27
From Day 1 up to Day 7 and Day 21 up to Day 27
Part A: Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of LNG/EE in the Absence and Presence of VX-407
Time Frame: From Day 1 up to Day 7 and Day 21 up to Day 27
From Day 1 up to Day 7 and Day 21 up to Day 27
Part B (Optional): Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of norelgestromin (NGMN) and norgestrel (NG) (active metabolites of NGM) and EE in the Absence and Presence of VX-407
Time Frame: From Day 1 up to Day 9 and Day 23 up to Day 31
From Day 1 up to Day 9 and Day 23 up to Day 31
Part C (Optional): Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of NET and EE in the Absence and Presence of VX-407
Time Frame: From Day 1 up to Day 5 and Day 19 up to Day 23
From Day 1 up to Day 5 and Day 19 up to Day 23
Part D (Optional): Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of DRSP and EE in the Absence and Presence of VX-407
Time Frame: From Day 1 up to Day 7 and Day 21 up to Day 27
From Day 1 up to Day 7 and Day 21 up to Day 27

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
Time Frame
Part A: Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)
Time Frame: From Day 1 up to Day 36
From Day 1 up to Day 36
Part B (Optional): Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)
Time Frame: From Day 1 Up to Day 39
From Day 1 Up to Day 39
Part C (Optional): Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)
Time Frame: From Day 1 up to Day 32
From Day 1 up to Day 32
Part D (Optional): Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)
Time Frame: From Day 1 up to Day 36
From Day 1 up to Day 36
Part A: Maximum Observed Plasma Concentration (Cmax) of VX-407
Time Frame: Days 9, 15 and 21 up to Day 27
Days 9, 15 and 21 up to Day 27
Part B (Optional): Maximum Observed Plasma Concentration (Cmax) of VX-407
Time Frame: Days 11, 17 and 23 up to Day 31
Days 11, 17 and 23 up to Day 31
Part C (Optional): Maximum Observed Plasma Concentration (Cmax) of VX-407
Time Frame: Days 7, 13 and 19 up to Day 23
Days 7, 13 and 19 up to Day 23
Part D (Optional): Maximum Observed Plasma Concentration (Cmax) of VX-407
Time Frame: Days 9, 15 and 21 up to Day 27
Days 9, 15 and 21 up to Day 27
Part A: Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-407
Time Frame: Days 9, 15 and 21 up to Day 27
Days 9, 15 and 21 up to Day 27
Part B (Optional): Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-407
Time Frame: Days 11, 17 and 23 up to Day 31
Days 11, 17 and 23 up to Day 31
Part C (Optional): Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-407
Time Frame: Days 7, 13 and 19 up to Day 23
Days 7, 13 and 19 up to Day 23
Part D (Optional): Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-407
Time Frame: Days 9, 15 and 21 up to Day 27
Days 9, 15 and 21 up to Day 27

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.
Vertex Pharmaceuticals Incorporated

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 28, 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.
March 11, 2027

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.
March 20, 2027

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).
August 25, 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.
August 25, 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.
August 28, 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.
August 28, 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.
August 25, 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.
August 1, 2026

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.
  • VX26-407-014

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Details on Vertex data sharing criteria and process for requesting access can be found at: https://www.vrtx.com/our-science/clinical-trials-data-sharing/

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

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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