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Mirdametinib

Phase 1

Healthy | Small molecule | Other |SpringWorks Therapeutics, Inc.|Last Updated: May 8, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
ACTIVE_CONTROLLEDBiomarker
Total Trials2
Total Enrollment68
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07279233To Assess the Enzyme Inducing Effects of Carbamazepine on the PK of Mirdametinib in Healthy ParticipantsPHASE1 COMPLETED 36Dec 15, 2025Feb 27, 2026May 8, 20261 United States
NCT06997276Effect of Hepatic Impairment on the Pharmacokinetics of MirdametinibPHASE1 RECRUITING 32May 7, 2025Sep 1, 2026May 8, 20263 United States
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Study Endpoints
Primary Endpoints
The geometric mean ratio of mirdametinib plasma area under the concentration-time curve from dosing extrapolated to infinity (AUCinf) of Mirdametinib
Day 1 to Day 29
The geometric mean ratio area under the concentration-time curve from dosing to time of last quantifiable concentration (AUClast) of Mirdametinib
Day 1 to Day 29
The geometric mean ratio of maximum observed concentration (Cmax) of Mirdametinib
Day 1 to Day 22
Maximum plasma concentration (Cmax) of mirdametinib
Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144, and 168-hours post dose.
Time of maximum observed concentration (Tmax) of mirdametinib
Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144, and 168-hours post dose.
Area under the concentration-time curve from dosing extrapolated to infinity (AUC0-inf) of mirdametinib
Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144, and 168-hours post dose.
Area under the concentration-time curve from dosing to time of last quantifiable concentration (AUClast) of mirdametinib
Pre-dose, 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 24, 36, 48, 72, 96, 120, 144, and 168-hours post dose.
Secondary Endpoints
Number of participants who Experience an Adverse Event
Up to a maximum of 36 days
AUCinf of Metabolites M15, M22, and M30
Day 1 to Day 29
AUClast of Metabolites M15, M22, and M30
Day 1 to Day 29
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Period 1 MirdametinibACTIVE_COMPARATORMirdametinib 6-mg single dose given orally alone on Day 1 as three 2-mg capsules following a 10-hour fast.
Period 2 Mirdametinib and carbamazepineEXPERIMENTALMirdametinib 6-mg single dose given orally on Day 22 in Period 2 as three 2-mg capsules following a 10-hour fast in combination with carbamazepine tablets that are administered orally according to the following schedule: * Days 8 and 9: 100 mg BID with meals * Days 10 and 11: 200 mg BID with meals * Days 12 through 21: 300 mg BID with meals * Day 22: 300 mg AM fasted, with mirdametinib, and 300 mg PM with meal * Days 23 through 28: 300 mg BID with meals * Days 29 through 30: no doses (observation only)
Moderate Hepatic ImpairmentOTHER -
Healthy Match ParticipantsOTHER -
Severe Hepatic ImpairmentOTHER -
Interventions
NameTypeDescription
MirdametinibDRUG6-mg single dose given orally on Day 1
Mirdametinib and CarbamazepineDRUGDrug: Mirdametinib 6-mg single dose given orally on Day 22. Drug: Carbamazepine Carbamazepine extended-release (ER) (Carbamazepine ER will be given orally twice daily for 21 days with a titration schedule \[100 mg BID for 2 days, 200 mg BID for 2 days, and then 300 mg BID\]).
Mirdametinib (MEK Inhibitor)DRUGMirdametinib will be administered as a single, oral, 4 mg dose in the morning on Day 1 for each study participant enrolled in the study.
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Eligibility Criteria
Age Range18 Years — 65 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: 1. Participant must sign the informed consent form (ICF) prior to any study-related procedures being performed. 2. Participant is male or female and between 18 and 65 years of age (inclusive) at the time of informed consent. 3. Participant has a body mass index (BMI) ≥18 and ≤32...

Countries:United States
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Recent Changes (Last 90 Days)
MEDIUMJun 8, 2026NCT07279233TRIAL_REMOVED: changed
MEDIUMJun 8, 2026NCT07279233TRIAL_REMOVED: changed
MEDIUMJun 8, 2026NCT07279233TRIAL_REMOVED: changed
MEDIUMJun 8, 2026NCT07279233TRIAL_REMOVED: changed
MEDIUMJun 8, 2026NCT07279233TRIAL_REMOVED: changed
LOWMay 26, 2026NCT06997276primaryCompletionDate: changed
LOWMay 24, 2026NCT06997276studyFirstPostDate: changed