CClinicalTrials.gg
CompletedNCT05866055Updated May 6, 2024

A Phase 1 Dose Escalation Study of VX-973 in Healthy Adults

A Phase 1 interventional study of VX-973 and Placebo in Pain, sponsored by Vertex Pharmaceuticals Incorporated. Completed at 1 site in United Kingdom. Open to participants aged 18 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-05-06.

Sponsored by Vertex Pharmaceuticals Incorporated · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was Apr 2024, 2 years 6 months ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
30
Allocation
Randomized
Ages
18 Years to 55 Years
Sex
All
01

Study summary

The purpose of this study is to evaluate the safety, tolerability, pharmacokinetics, and pharmacodynamics of single and multiple doses of VX-973 in healthy participants.

Read the detailed description

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.).

02

Conditions studied

  • Pain
03

In context

Lead sponsor

Vertex Pharmaceuticals Incorporated is the lead sponsor of 243 studies on the registry; 19 are open to participants now.

Of its 102 completed or terminated interventional studies of FDA-regulated products, 49 (48%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 55 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Eligibility criteria

Key Inclusion Criteria:

  • Body mass index (BMI) of 18.0 to 32.0 kilogram per meter square (kg/m\^2)
  • A total body weight of more than (>) 50 kg
  • Participants of non-childbearing potential
  • Nonsmoker or ex-smoker for at least 3 months before screening

Key Exclusion Criteria:

  • History of febrile illness or other acute illness that has not fully resolved within 14 days before the first dose of study drug
  • Any condition possibly affecting drug absorption

Other protocol defined Inclusion/Exclusion criteria may apply.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Sequential assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
30 participants (actual)

Study arms

  • Experimental
    Part A: Single Ascending Dose

    Participants will be randomized to receive a single dose of VX-973 under fasted conditions.

    Drug: VX-973

  • Experimental
    Part B: Multiple Ascending Dose

    Participants will be randomized to receive multiple doses of VX-973 under fasted conditions. The dose and frequency will be determined based on Part A. Midazolam is planned to be administered as single oral doses of 2 mg first alone on Day -1 and then co-administered with study drug on Day 27.

    Drug: VX-973 · Drug: Midazolam

  • Placebo comparator
    Placebo Part A

    Participants will be randomized to receive placebo matched to VX-973.

    Drug: Placebo

  • Placebo comparator
    Placebo Part B

    Participants will be randomized to receive placebo matched to VX-973. Midazolam is planned to be administered as single oral doses of 2 mg first alone on Day -1 and then co-administered with placebo matched to VX-973 on Day 27.

    Drug: Placebo · Drug: Midazolam

Interventions

  • DrugVX-973

    Suspension for oral administration.

  • DrugPlacebo

    Suspension for oral administration.

  • DrugMidazolam

    Syrup for oral administration.

06

What researchers measure

Primary outcomes

  1. 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 31

  2. Part B: 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 43

Secondary outcomes

  1. Part A: Maximum Observed Plasma Concentration (Cmax) of VX-973

    Time frame: From Day 1 up to Day 30

  2. Part B: Maximum Observed Plasma Concentration (Cmax) of VX-973

    Time frame: From Day 1 up to Day 43

  3. Part A: Area Under the Concentration Versus Time Curve (AUC) of VX-973

    Time frame: From Day 1 up to Day 30

  4. Part B: Area Under the Concentration Versus Time Curve (AUC) of VX-973

    Time frame: From Day 1 up to Day 43

  5. Part B: Maximum Observed Plasma Concentration (Cmax) of Midazolam in the Absence and Presence of VX-973

    Time frame: Days -1 and 27: Pre-dose up to 24 hours Post Midazolam dose

  6. Part B: Area Under the Concentration Versus Time Curve (AUC) of Midazolam in the Absence and Presence of VX-973

    Time frame: Days -1 and 27: Pre-dose up to 24 hours Post Midazolam dose

07

Study locations

1 site
  • PAREXEL International
    Harrow, United Kingdom
08

References and documents

Individual participant data

Plan to share: No — Details on Vertex data sharing criteria and process for requesting access can be found at: https://www.vrtx.com/independent-research/clinical-trial-data-sharing

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 6, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05866055
Lead sponsor
Vertex Pharmaceuticals Incorporated
Responsible party
Sponsor
First posted
May 19, 2023
Start date
May 10, 2023
Primary completion
Apr 4, 2024
Completion
Apr 4, 2024
Last update
May 6, 2024

Oversight

FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in May 2024. You cannot join it, but the record below documents what was studied.

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