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Effects of Efavirenz on the Pharmacokinetics of Suzetrigine in Healthy Participants

A Phase 1, Open-label Drug-drug Interaction Study to Evaluate the Effects of Efavirenz on the Pharmacokinetics of Suzetrigine in Healthy Subjects

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07570069
Enrollment
18
Registered
2026-05-06
Start date
2026-05-07
Completion date
2026-07-16
Last updated
2026-08-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pain

Brief summary

The purpose of the study is to evaluate the pharmacokinetics (PK) of Suzetrigine (SUZ) and its metabolite in the absence and presence of efavirenz, a moderate CYP3A inducer. In addition, the purpose is to evaluate the safety and tolerability of SUZ when administered in the absence and presence of efavirenz.

Detailed description

The study is being conducted to evaluate the effects of efavirenz on the PK of SUZ in healthy participants and consists of Screening Phase, Treatment Phase and Safety Follow-up Phase. Participants will receive study medication for a duration of 30 days. Note: 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.).

Interventions

DRUGSuzetrigine

Tablet for oral administration.

DRUGEfavirenz

Tablet for oral administration.

Sponsors

Vertex Pharmaceuticals Incorporated
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
Yes

Inclusion 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 greater than (\>) 50 kg * Males and females of non-childbearing potential Key

Exclusion criteria

* History of any illness or any clinical condition that may confound the results of the study or pose an additional risk in administering study drug to the participant * History of febrile illness or other acute illness that has not fully resolved within 5 days before the first dose of study drug * Any condition possibly affecting drug absorption Other protocol defined Inclusion/

Design outcomes

Primary

MeasureTime frame
Maximum Observed Plasma Concentration (Cmax) of SUZ and its Metabolite in the Absence and Presence of EfavirenzDay 15 and Day 30
Area Under the Concentration Versus Time Curve During a Dosing Interval (AUCτ) of SUZ and its Metabolite in the Absence and Presence of EfavirenzDay 15 and Day 30

Secondary

MeasureTime frame
Safety and Tolerability as Assessed by Number of Participants with Adverse Events (AEs) and Serious Adverse Events (SAEs)From Day 1 up to Day 46

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 19, 2026