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VX-548

Phase 2

Acute Pain | Small molecule | Pain |Vertex Pharmaceuticals Incorporated|Last Updated: Oct 1, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials2
Total Enrollment577

FDA Designations

No designations recorded

Clinical trial landscape

VX-548 · 10 trials · 3 indications

Phase 2 3Phase 1 7
NCT06176196Evaluation of Efficacy and Safety of VX-548 for Painful Lumbosacral Radiculopathy (PLSR)Painful Lumbosacral Radiculopathy
COMPLETED218 Analytics
NCT05034952A Study Evaluating Efficacy and Safety of VX-548 for Acute Pain After an AbdominoplastyAcute Pain
COMPLETED303 Analytics
NCT04977336A Study Evaluating Efficacy and Safety of VX-548 for Acute Pain After a BunionectomyAcute Pain
COMPLETED274 Analytics
PHASE2COMPLETED
Evaluation of Efficacy and Safety of VX-548 for Painful Lumbosacral Radiculopathy (PLSR)
Painful Lumbosacral RadiculopathyUnlock trial analytics
PHASE2COMPLETED
A Study Evaluating Efficacy and Safety of VX-548 for Acute Pain After an Abdominoplasty
Acute PainUnlock trial analytics
PHASE2COMPLETED
A Study Evaluating Efficacy and Safety of VX-548 for Acute Pain After a Bunionectomy
Acute PainUnlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in the Weekly Average of Daily leg Pain Intensity on a Numeric Pain Rating Scale (NPRS)
Baseline, Week 12
Time-weighted Sum of the Pain Intensity Difference (SPID) as Recorded on a Numeric Pain Rating Scale (NPRS) at Rest 0 to 48 Hours (SPIDr0-48) After the First Dose of Study Drug
0 to 48 Hours After First Dose of Study Drug

SPID was calculated as the sum of the product of time (in hours) elapsed since previous measurements and pain intensity difference. Pain intensity difference was calculated by subtracting the pain intensity score at given post-dose time points from the baseline pain intensity scores (using pain rating score range: 0= no pain to 10= worst possible pain). SPIDr0-48 was calculated from 0 to 48 hours and the score range was -480 (worst score) to 480 (best score).

Time-Weighted Sum of Pain Intensity Difference (SPID) as Recorded on a Numeric Pain Rating Scale (NPRS) 0 to 48 Hours (SPID48) After the First Dose of Study Drug
0 to 48 hours After First Dose of Study Drug

SPID was calculated as the sum of the product of time (in hours) elapsed since previous measurements and pain intensity difference. Pain intensity difference was calculated by subtracting the pain intensity score at given post-dose time points from the baseline pain intensity scores (using pain rating score range: 0= no pain to 10= worst possible pain). SPID48 was calculated from 0 to 48 hours and the score range was -480 (worst score) to 480 (best score).

Maximum Observed Plasma Concentration (Cmax) of VX-548 and its Metabolite
Pre-dose up to Day 35 Post-dose
Area Under the Concentration Versus Time Curve From the Time of Dosing to the Last Measurable Concentration (AUC0-tlast) of VX-548 and its Metabolite
Pre-dose up to Day 35 Post-dose
Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-548 and its Metabolite
Pre-dose up to Day 35 Post-dose
Change in QT interval corrected by Fridericia's formula (QTcF)
From Baseline up to Day 12
Area Under the Plasma Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-548 and its Metabolite
Day 1 to Day 14
Part A: Maximum Observed Plasma Concentration (Cmax) of VX-548 and its Metabolite in the Absence and Presence of Omeprazole
Day 1 up to Day 22
Part A: Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-548 and its Metabolite in the Absence and Presence of Omeprazole
Day 1 up to Day 22
Part B: Maximum Observed Plasma Concentration (Cmax) of VX-548 and its Metabolite in the Absence and Presence of Rifampin
Day 1 up to Day 28
Part B: Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-548 and its Metabolite in the Absence and Presence of Rifampin
Day 1 up to Day 28
Maximum Observed Plasma Concentration (Cmax) of VX-548
Day 1 to Day 31
Area Under the Plasma Concentration Versus Time Curve During a Dosing Interval (AUCtau) of VX-548
Day 1 to Day 31
Time Taken for VX-548 to Reach Maximum Concentration (tmax)
Day 1 to Day 31
Time Required for Plasma Concentration of VX-548 to Reduce to Half (t1/2)
Day 1 to Day 31
Apparent Volume of Distribution of VX-548 (Vz/F)
Day 1 to Day 31
Apparent Clearance of VX-548 (CL/F)
Day 1 to Day 31
Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to the Last Measured Concentration (AUC0-last) of VX-548
Day 1 to Day 31
Maximum Observed Plasma Concentration (Cmax) of Midazolam in the Absence and Presence of VX-548
Days 1 and 19: Pre-dose up to 24 hours post midazolam dose
Maximum Observed Plasma Concentration (Cmax) of Digoxin in the Absence and Presence of VX-548
Days 1 and 19: Pre-dose up to 120 hours post digoxin dose
Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of Midazolam in the Absence and Presence of VX-548
Days 1 and 19: Pre-dose up to 24 hours post midazolam dose
Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of Digoxin in the Absence and Presence of VX-548
Days 1 and 19: Pre-dose up to 120 hours post digoxin dose
Area Under the Concentration Versus Time Curve From the Time of Dosing to the Last Measurable Concentration (AUClast) of Midazolam in the Absence and Presence of VX-548
Days 1 and 19: Pre-dose up to 24 hours post midazolam dose
Area Under the Concentration Versus Time Curve From the Time of Dosing to the Last Measurable Concentration (AUClast) of Digoxin in the Absence and Presence of VX-548
Days 1 and 19: Pre-dose up to 120 hours post digoxin dose
Area Under the Concentration Versus Time Curve From the Time of Dosing to the Last Measurable Concentration (AUClast) of VX-548
Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 24, 48, 72, 96, 144, up to 216 hours Post-dose
Area Under the Concentration Versus Time Curve From the Time of Dosing Extrapolated to Infinity (AUC0-inf) of VX-548
Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 24, 48, 72, 96, 144, up to 216 hours Post-dose

Secondary Endpoints

Change From Baseline in the Weekly Average of the Daily Sleep Interference Scale (DSIS)
Baseline, Week 12
Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)
From Day 1 up to Week 14
Time-weighted SPID as Recorded on an NPRS at Rest 0 to 24 Hours (SPIDr0-24) After the First Dose of Study Drug
0 to 24 Hours After First Dose of Study Drug
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
VX-548EXPERIMENTALParticipants will receive VX-548 up to 12 weeks.
PlaceboPLACEBO_COMPARATORParticipants will receive placebo matched to VX-548 up to 12 weeks.
HB/APAPACTIVE_COMPARATORParticipants received HB 5 mg / APAP 325 milligrams (mg) every 6 hours (q6h) for 2 days.
VX-548: Low DoseEXPERIMENTALParticipants received VX-548 60 mg as first dose, followed by VX-548 30 mg every 12 hours (q12h) for 2 days.
VX-548: High DoseEXPERIMENTALParticipants received VX-548 100 mg as first dose, followed by VX-548 50 mg q12h for 2 days.
VX-548: Mid DoseEXPERIMENTALParticipants received VX-548 60 mg as first dose, followed by VX-548 30 mg q12h for 2 days.
Group 1EXPERIMENTALParticipants will receive VX-548-matching placebo, moxifloxacin-matching placebo and VX-548 at different time points.
Group 2AACTIVE_COMPARATORParticipants will receive VX-548-matching placebo, moxifloxacin and moxifloxacin-matching placebo at different time points.
Group 2BACTIVE_COMPARATORParticipants will receive VX-548-matching placebo, moxifloxacin-matching placebo and moxifloxacin at different time points.
Cohort 1: Severe Renal ImpairmentEXPERIMENTALParticipants will receive a single dose of VX-548 in a fasted state.
Cohort 2: Matched Healthy ParticipantsEXPERIMENTALHealthy participants matched to cohort 1 will receive a single doses of VX-548 in a fasted state.
Cohort 3: Moderate Renal ImpairmentEXPERIMENTALParticipants will receive a single dose of VX-548 in a fasted state.
Cohort 4: Matched Healthy ParticipantsEXPERIMENTALHealthy participants matched to cohort 3 will receive a single dose of VX-548 in a fasted state.
Part AEXPERIMENTALParticipants will receive a single dose of VX-548 on Day 1 and a single dose of omeprazole once daily (qd) on Days 10 through Day 12. On Day 13, participants will receive omeprazole followed by VX-548 under fasted conditions.
Part BEXPERIMENTALParticipants will receive a single dose of VX-548 on Day 1 followed by rifampin qd on Days 10 through Day 27. On Day 19, participants will be co-administered rifampin and VX-548 under fasted conditions.
Cohort 1: Mild Hepatic ImpairmentEXPERIMENTALParticipants will receive multiple doses of VX-548 every 12 hours (q12h) from Day 1 through Day 14.
Cohort 3: Moderate Hepatic ImpairmentEXPERIMENTALParticipants will receive multiple doses of VX-548 q12h from Day 1 through Day 14.
Arm 1EXPERIMENTALParticipants will receive a single dose of midazolam and digoxin on Day 1 in dosing period 1 followed by VX-548 every 12 hours (q12h) on Days 6 through 23 in dosing period 2. On Day 19, single doses of midazolam and digoxin will be administered with the morning dose of VX-548.
Sequence 1EXPERIMENTALParticipants will receive VX-548 reference tablet (TF1) under fasted condition in dosing period 1, then VX-548 test tablet (TF2) under fasted condition in dosing period 2, and finally VX-548 test tablet (TF2) under fed condition in dosing period 3. A washout period of 12 days will be maintained between 3 dosing periods.
Sequence 2EXPERIMENTALParticipants will receive VX-548 TF1 under fasted condition in dosing period 1, then VX-548 TF2 under fed condition in dosing period 2, and finally VX-548 TF2 under fasted condition in dosing period 3. A washout period of 12 days will be maintained between 3 dosing periods.
Sequence 3EXPERIMENTALParticipants will receive VX-548 TF2 under fasted condition in dosing period 1, then VX-548 TF1 under fasted condition in dosing period 2, and finally VX-548 TF2 under fed condition in dosing period 3. A washout period of 12 days will be maintained between 3 dosing periods.
Sequence 4EXPERIMENTALParticipants will receive VX-548 TF2 under fasted condition in dosing period 1, then VX-548 TF2 under fed condition in dosing period 2, and finally VX-548 TF1 under fasted condition in dosing period 3. A washout period of 12 days will be maintained between 3 dosing periods.
Sequence 5EXPERIMENTALParticipants will receive VX-548 TF2 under fed condition in dosing period 1, then VX-548 TF1 under fasted condition in dosing period 2, and finally VX-548 TF2 under fasted condition in dosing period 3. A washout period of 12 days will be maintained between 3 dosing periods.
Sequence 6EXPERIMENTALParticipants will receive VX-548 TF2 under fed condition in dosing period 1, then VX-548 TF2 under fasted condition in dosing period 2, and finally VX-548 TF1 under fasted condition in dosing period 3. A washout period of 12 days will be maintained between 3 dosing periods.

Interventions

NameTypeDescription
VX-548DRUGTablets for oral administration.
PlaceboDRUGTablets for oral administration.
HB/APAPDRUGCapsules for oral administration.
Placebo (matched to VX-548)DRUGPlacebo matched to VX-548 for oral administration.
Placebo (matched to HB/APAP)DRUGPlacebo matched to HB/APAP for oral administration.
MoxifloxacinDRUGCapsules for oral administration.
Moxifloxacin PlaceboDRUGCapsules for oral administration.
VX-548 PlaceboDRUGTablets for oral administration.
OmeprazoleDRUGTablets for oral administration.
RifampinDRUGCapsules for oral administration.
MidazolamDRUGSyrup for oral administration.
DigoxinDRUGTablets for oral administration.
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Eligibility Criteria

Age Range18 Years to 70 Years
SexALL
Healthy VolunteersNo
Study Sites54

Key Inclusion Criteria: * Body weight greater than or equal to (\>=)45 kilogram (kg) * Body mass index (BMI) less than or equal to (\<=) 40 kg/ meter square (m\^2) * Diagnosis of PLSR for greater than (\>)3 months as per criteria pre-specified in the protocol * Weekly average of daily NPRS score \>...

Countries:United StatesAustralia
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Competitive Landscape -Acute Kidney Injury 14 trials (matched to "Acute Pain")

Frequently asked questions about VX-548

What is VX-548 used for?

VX-548 is an investigational small molecule being developed for the treatment of pain, including acute pain and painful lumbosacral radiculopathy. It is being studied in clinical trials for these conditions. The drug is not approved and remains in clinical development.

Who makes VX-548?

VX-548 is being developed by Vertex Pharmaceuticals Incorporated, a biopharmaceutical company traded on the NASDAQ under the ticker symbol VRTX. The company is conducting clinical trials to evaluate the drug's efficacy and safety for pain-related conditions.

What phase is VX-548 in?

VX-548 is in Phase 2 clinical development. It has completed Phase 2 trials for acute pain and painful lumbosacral radiculopathy, as well as a Phase 1 trial. The drug is investigational and has not been approved by regulatory authorities.

What clinical trials is VX-548 in?

VX-548 has completed several clinical trials, including NCT04977336 for acute pain after bunionectomy, NCT05034952 for acute pain after abdominoplasty, NCT05851157 for pain pharmacokinetics, and NCT06176196 for painful lumbosacral radiculopathy. All trials are completed with no active trials ongoing.

Is VX-548 the same as suzetrigine?

VX-548 is also known as suzetrigine. This alternative name is used in some contexts, and both names refer to the same investigational drug being developed by Vertex Pharmaceuticals for pain indications.