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Relacorilant

Phase 3

Hypercortisolism | Small molecule | Endocrine |Corcept Therapeutics Incorporated|Last Updated: Aug 25, 2026

Target and mechanism

Molecular targetNR3C1
Target classAntagonist
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment137

FDA Designations

No designations recorded

Clinical trial landscape

Relacorilant · 11 trials · 11 indications

Phase 3 2Phase 2 3Phase 1 6
NCT04308590A Study of the Efficacy and Safety of Relacorilant in Patients With Cortisol-Secreting Adrenal AdenomasHypercortisolism
COMPLETED137 Analytics
NCT03697109A Study of the Efficacy and Safety of Relacorilant in Patients With Endogenous Cushing SyndromeCushing Syndrome
COMPLETED152 Analytics
PHASE3COMPLETED
A Study of the Efficacy and Safety of Relacorilant in Patients With Cortisol-Secreting Adrenal Adenomas
HypercortisolismUnlock trial analytics
PHASE3COMPLETED
A Study of the Efficacy and Safety of Relacorilant in Patients With Endogenous Cushing Syndrome
Cushing SyndromeUnlock trial analytics

Study Endpoints

Primary Endpoints

Change in Average 24-hour SBP
Baseline and Week 22

Blood pressure was measured by 24-hour ABPM. The 24-hour average SBP is reported.

Number of Patients With 1 or More Treatment-emergent Adverse Events (TEAEs) as Graded by CTCAE v5.0.
Baseline and up to Week 26
Number of Patients With Loss of Response With Respect to Hypertension During the RW Phase.
Week 22 (end of OL Phase) and Week 36 (Week 12 of RW Phase)

Loss of response with respect to HTN was measured using 6 criteria: 1) an increase in SBP of at least 5 mm Hg, 2) an increase in DBP of at least 5 mm Hg, 3) an increase in SBP and/or DBP of at least 5 mm Hg, 4) use of HTN rescue medication, 5) treatment discontinuation, and 6) missing 24-hour ambulatory blood pressure monitoring (ABPM) measurement at the end of the RW Phase. Blood pressure was measured using ABPM. Use of rescue medication was defined as any increase, modification, or addition of antihypertensive medication due to worsening HTN. Treatment discontinuation reports the number of patients who discontinued study treatment in the RW Phase for any reason.

Percent of Patients who Experience Dose Limiting Toxicity (DLT) (Part 1)
Up to 28 days after the first dose of study treatment

The percentage of patients with a DLT is used to estimate maximum tolerated dose (MTD), the most intense dose/schedule among those evaluated at which \<33% of patients experience DLT.

Number of Patients with 1 or More Adverse Events (AEs) Leading to Study Drug Discontinuations or Dose Modifications (Part 1)
Time of first dose up to 30 days after last dose
Progression-Free Survival (PFS) (Part 2)
From date of enrollment until the date of first documented progression or date of death from any cause, whichever comes first, assessed up to 12 months

To evaluate PFS as the time from enrollment until first documented progressive disease (PD) by Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 as determined by the Investigator, or death due to any cause, whichever comes first.

Progression-free Survival (PFS)
Baseline and up to 15 months

To assess time from randomization until the date of first documented progressive disease (PD) by RECIST v1.1 (as determined by the Investigator at the local site), or death due to any cause, whichever occurs first.

Long-term safety of relacorilant
36 months

Number of patients with treatment-emergent adverse events (TEAEs) as assessed by Common Terminology Criteria for Adverse Events (CTCAE) v4.0 or higher

Maximum Observed Plasma Concentration (Cmax) of Dabigatran When Administered With and Without Relacorilant
Up to Day 14
Area Under the Curve from Time 0 to the Time of Last Measurable Concentration (AUC0-last) of Dabigatran When Administered With and Without Relacorilant
Up to Day 14
Area Under the Curve from Time 0 Extrapolated to Infinity (AUC 0-inf) of Dabigatran When Administered With and Without Relacorilant
Up to Day 14
Placebo-corrected Change from Baseline in Cardiac QT Interval Corrected by Fridericia's Formula (QTcF)
Before dosing (Baseline) through 24 hours after the final dose on Day 5 in each treatment period
Dose-limiting Toxicity (DLT)
Up to 12 weeks

Evaluate the percentage of patients with a dose-limiting toxicity

Maximum concentration of plasma relacorilant during the dosing interval (Cmax)
Predose and at serial time points up to 24 hours after dosing on Day 10
Area under the concentration-time curve of plasma relacorilant from time zero to the end of the dosing interval (24 hours) (AUCt)
Predose and at serial time points up to 24 hours after dosing on Day 10
Area under plasma concentration-time curve up to the last quantifiable sample (AUC0-tz)
pre-dose to 120 hours post-dose in Periods 1 -3.

Ratio of population geometric means (GMR) of AUC0-tz for Test 1 (relacorilant 3×100-mg softgel capsules) and Reference (relacorilant 6×50-mg hard-shell capsules) and for Test 2 (relacorilant 3×100-mg hard-shell capsules) and Reference (relacorilant 6×50-mg hard-shell capsules)

Secondary Endpoints

Change in Area Under the Concentration-time Curve of Blood Glucose (AUCglucose)
Before and at time intervals up to 2 hours post glucose drink at Baseline and Week 22
Change in Average Diastolic Blood Pressure (DBP)
Baseline and Week 22
Change in Average Heart Rate (HR)
Baseline and Week 22
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
RelacorilantEXPERIMENTALPatients will receive relacorilant increased sequentially from 100 mg once daily to a maximum dose of 400 mg once daily.
PlaceboPLACEBO_COMPARATORPatients will receive placebo matched to study drug once daily.
Relacorilant (OL Phase)EXPERIMENTALPatients will receive relacorilant increased sequentially from 100 mg once daily to a maximum dose of 400 mg once daily.
Relacorilant (RW Phase)EXPERIMENTALPatients who meet any of the response criteria will advance to the RW Phase of the study and receive the same dose of relacorilant as the last dose administered in the OL Phase.
Placebo (RW Phase)PLACEBO_COMPARATORPatients who meet any of the response criteria will advance to the RW Phase of the study and receive placebo matched to study drug.
Relacorilant in Combination with Nab-paclitaxel and GemcitabineEXPERIMENTALThe patient will receive relacorilant administered orally under fed conditions, once daily for 3 consecutive days on the day before (excluding Cycle 1 Day -1), the day of, and the day after nab-paclitaxel and gemcitabine intravenous (IV) infusions. Various dose levels and dosing schedules of relacorilant, nab-paclitaxel, and gemcitabine will be evaluated. On days when relacorilant, nab-paclitaxel, and gemcitabine are administered, relacorilant will be administered first, then nab-paclitaxel, and gemcitabine last.
Arm A: Continuous Relacorilant DosingEXPERIMENTALPatients will receive relacorilant 100 mg (titrated up to 150 mg after Cycle 1 or 2) once daily in combination with nab-paclitaxel 80 mg/m\^2, on Days 1, 8, and 15 of each 28-day cycle.
Arm B: Intermittent Relacorilant DosingEXPERIMENTALPatients will receive relacorilant 150 mg on the day before (excluding Cycle 1, Day -1), the day of, and the day after nab-paclitaxel, in combination with nab-paclitaxel 80 mg/m\^2, on Days 1, 8, and 15 of each 28-day cycle.
Arm C: Nab-paclitaxel ComparatorACTIVE_COMPARATORPatients will receive nab-paclitaxel 100 mg/m\^2 on Days 1, 8, and 15 of each 28-day cycle. Patients initially in Arm C who choose to cross over after disease progression will receive relacorilant 100 mg (titrated up to 150 mg) in combination with nab-paclitaxel 80 mg/m\^2 on Days 1, 8, and 15 of each 28-day cycle after cross over.
relacorilant (CORT125134)EXPERIMENTAL -
Dabigatran Etexilate (NIMP) and Relacorilant (IMP)EXPERIMENTALFollowing an overnight fast, participants will receive 75 mg dabigatran etexilate on Day 1, 400 mg dose of relacorilant QD on Days 3 to 13, and 75 mg dabigatran etexilate on Day 12. On Day 12, dabigatran etexilate will be dosed at approximately the same time as the relacorilant dose.
Treatment Sequence 1EXPERIMENTALParticipants will receive relacorilant 400 mg once daily (QD) for 5 days in Period 1, followed by relacorilant 800 mg QD for 5 days in Period 2, followed by placebo to relacorilant QD for 5 days in Period 3, followed by placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 2EXPERIMENTALParticipants will receive relacorilant 800 mg QD for 5 days in Period 1, followed by placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 2, followed by relacorilant 400 mg QD for 5 days in Period 3, followed by placebo to relacorilant QD for 5 days in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 3EXPERIMENTALParticipants will receive placebo to relacorilant QD for 5 days in Period 1, followed by relacorilant 400 mg QD for 5 days in Period 2, followed by placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 3, followed by relacorilant 800 mg QD for 5 days in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 4EXPERIMENTALParticipants will receive relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 1, followed by placebo to relacorilant QD for 5 days in Period 2, followed by relacorilant 800 mg QD for 5 days in Period 3, followed by relacorilant 400 mg QD for 5 days in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 5EXPERIMENTALParticipants will receive relacorilant 800 mg QD for 5 days in Period 1, followed by placebo to relacorilant QD for 5 days in Period 2, followed by relacorilant 400 mg QD for 5 days in Period 3, followed by relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 6EXPERIMENTALParticipants will receive placebo to relacorilant QD for 5 days in Period 1, followed by placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 2, followed by relacorilant 800 mg QD for 5 days in Period 3, followed by relacorilant 400 mg QD for 5 days in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 7EXPERIMENTALParticipants will receive relacorilant 400 mg QD for 5 days in Period 1, followed by relacorilant 800 mg QD for 5 days in Period 2, followed by placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 3, followed by placebo to relacorilant QD for 5 days in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 8EXPERIMENTALParticipants will receive placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 1, followed by relacorilant 400 mg QD for 5 days in Period 2, followed by placebo to relacorilant QD for 5 days in Period 3, followed by relacorilant 800 mg QD for 5 days in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 9EXPERIMENTALParticipants will receive placebo to relacorilant QD for 5 days in Period 1, followed by relacorilant 400 mg QD for 5 days in Period 2, followed by relacorilant 800 mg QD for 5 days in Period 3, followed by placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 10EXPERIMENTALParticipants will receive relacorilant 400 mg QD for 5 days in Period 1, followed by placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 2, followed by placebo to relacorilant QD for 5 days in Period 3, followed by relacorilant 800 mg QD for 5 days in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 11EXPERIMENTALParticipants will receive relacorilant 800 mg QD for 5 days in Period 1, followed by placebo to relacorilant QD for 5 days in Period 2, followed by placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 3, followed by relacorilant 400 mg QD for 5 days in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Treatment Sequence 12EXPERIMENTALParticipants will receive placebo to relacorilant QD for 4 days and moxifloxacin 400 mg on Day 5 in Period 1, followed by relacorilant 800 mg QD for 5 days in Period 2, followed by relacorilant 400 mg QD for 5 days in Period 3, followed by placebo to relacorilant QD for 5 days in Period 4. Treatment periods will be separated by a washout of at least 10 days.
Relacorilant in Combination with PembrolizumabEXPERIMENTALParticipants will be treated on Day -3 to Day 1 (Cohort 1 under fasting conditions) or Day -6 to Day 1 (Cohort 2 under fed conditions) for Cycle 1 only. During the lead-in period, 300 mg relacorilant will be administered daily for 4 -7 days. Patients will receive their first pembrolizumab infusion on Cycle 1 Day 1. The participants will then receive combined treatment from Cycle 1 Day 1 until confirmed PD or unacceptable toxicity. Pembrolizumab will be administered every 6 weeks (on Day 1 of each 42-day cycle) and relacorilant will be administered daily. Optional Cohort 3 will lead-in with 400 mg relacorilant once daily for 7 days and combined treatment of relacorilant and pembrolizumab, depending on PD and toxicity.
No Hepatic ImpairmentEXPERIMENTALSubjects with no hepatic impairment will receive relacorilant 300 mg once daily on Days 1 through 10.
Moderate Hepatic ImpairmentEXPERIMENTALSubjects with moderate hepatic impairment (Child-Pugh Class B) will receive relacorilant 300 mg once daily on Days 1 through 10.
Mild Hepatic ImpairmentEXPERIMENTALSubjects with mild hepatic impairment (Child-Pugh Class A) will receive relacorilant 300 mg once daily on Days 1 through 10.
Relacorilant 3x100mg softgel capsulesEXPERIMENTALRelacorilant (3x100 mg softgel capsules)
Relacorilant 3x100mg hard-shell capsulesEXPERIMENTALRelacorilant (3x100 mg hard-shell capsules)
Relacorilant 6x50mg hard-shell capsulesEXPERIMENTALRelacorilant (6x50mg hard-shell capsules)
Part 1 Period 1EXPERIMENTALPart 1 Period 1: Relacorilant 350mg will be given once on Day 1
Part 1 Period 2EXPERIMENTALPart 1 Period 2: Itraconazole 200mg will be given for three days
Part 1 Period 3EXPERIMENTALPart 1 Period 3: Relacorilant 350mg will be given once with concomitant itraconazole and itraconazole will continue for three additional days
Part 2 Period AEXPERIMENTALPart 2 Period A: Relacorilant 300mg will be given once daily for 10 days
Part 2 Period BEXPERIMENTALPart 2 Period B: Relacorilant 300mg will be given once daily in combination with itraconazole 200mg once daily for 10 days

Interventions

NameTypeDescription
RelacorilantDRUGRelacorilant is supplied as blister-packed capsules for oral dosing. Relacorilant 400 mg dose consists of 4 relacorilant 100-mg capsules. Relacorilant 100-mg, 200-mg, and 300-mg doses are each given as a combination of 4 capsules containing relacorilant 100-mg and placebo as per the assigned dose.
PlaceboOTHERPlacebo is supplied as blister-packed capsules for oral dosing. Each dose consists of 4 capsules containing placebo.
Nab-paclitaxelDRUGNab-paclitaxel will be administered via IV infusion.
GemcitabineDRUGGemcitabine will be administered via IV infusion.
Dabigatran EtexilateDRUGDabigatran will be administered orally as a 75 mg capsule on Day 1 and Day 12.
Placebo to relacorilantDRUGPlacebo to relacorilant capsule by mouth once daily
MoxifloxacinDRUGMoxifloxacin 400 mg tablet by mouth
PembrolizumabDRUGPembrolizumab 400 mg infusion every 6 weeks
Relacorilant (3x100 mg softgel capsules)DRUGA single relacorilant 300mg dose (3x100 mg softgel capsules) will be given once on Day 1 of one of three treatment periods.
Relacorilant (3x100 mg hard-shell capsules)DRUGA single relacorilant 300mg dose (3x100 mg hard-shell capsules) will be given once on Day 1 of one of three treatment periods.
Relacorilant (6x50mg hard-shell capsules)DRUGA single relacorilant 300mg dose (6x50mg hard-shell capsules) will be given once on Day 1 of one of three treatment periods.
Relacorilant 350mgDRUGRelacorilant 350mg
ItraconazoleDRUGItraconazole 200 mg
Relacorilant 300mgDRUGRelacorilant 300mg
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Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersNo
Study Sites45

Inclusion Criteria: * Shows lack of cortisol suppression on dexamethasone suppression test * Suppressed or low early-morning adrenocorticotropic hormone (ACTH) levels * A radiologically confirmed adrenal lesion * Has IGT or DM * Has uncontrolled HTN Exclusion Criteria: * Has severe, uncontrolled ...

Countries:United StatesAustriaBulgariaGermanyIsraelItalyPolandRomaniaSpainCanadaNetherlandsBelgium
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Recent Changes (Last 90 Days)

LOWAug 25, 2026NCT03604198lastUpdatePostDate: changed
LOWAug 25, 2026NCT03604198lastUpdatePostDate: changed
LOWAug 19, 2026NCT07259317lastUpdatePostDate: changed
LOWAug 19, 2026NCT07259317lastUpdatePostDate: changed
LOWAug 19, 2026NCT07259317lastUpdatePostDate: changed
LOWAug 14, 2026NCT03604198lastUpdatePostDate: changed
LOWAug 14, 2026NCT03604198lastUpdatePostDate: changed
LOWAug 14, 2026NCT03604198lastUpdatePostDate: changed
LOWJul 15, 2026NCT07259317lastUpdatePostDate: changed
LOWJul 15, 2026NCT07259317lastUpdatePostDate: changed
MEDIUMJun 18, 2026NCT07259317Enrollment: 60 → 80
MEDIUMJun 18, 2026NCT07259317Enrollment: 60 → 80
MEDIUMJun 18, 2026NCT07259317Enrollment: 60 → 80
MEDIUMJun 18, 2026NCT07259317Enrollment: 60 → 80

Frequently asked questions about Relacorilant

What is Relacorilant used for?

Relacorilant is an investigational small molecule being studied for use in Cushing syndrome, solid tumors, recurrent ovarian cancer, adenocarcinoma, and hepatic impairment. It is being developed by Corcept Therapeutics Incorporated (CORT) and is currently in Phase 2 clinical development for these indications.

What does Relacorilant target?

Relacorilant is a selective glucocorticoid receptor modulator. It works by binding to the glucocorticoid receptor, which is involved in regulating various physiological processes. This mechanism is being studied for its potential effects in oncology and endocrine conditions like Cushing syndrome.

Who makes Relacorilant?

Relacorilant is being developed by Corcept Therapeutics Incorporated, a biopharmaceutical company traded on NASDAQ under the ticker symbol CORT. The company is conducting clinical trials to evaluate the drug's safety and efficacy across multiple indications.

What phase is Relacorilant in?

Relacorilant is in Phase 2 clinical development. It has completed Phase 1 and Phase 2 trials, with one active Phase 2 study currently recruiting participants. The drug is investigational and has not been approved by regulatory authorities for any indication.

What clinical trials is Relacorilant in?

Relacorilant has been studied in several clinical trials. NCT02762981 evaluated it with nab-paclitaxel in solid tumors, NCT03604198 is an extension study in Cushing syndrome, NCT05347979 assessed its effect on drug interactions, and NCT07259317 is an ongoing Phase 2 trial in metastatic pancreatic adenocarcinoma.

Is Relacorilant the same as CORT125134?

Yes, Relacorilant is also known as CORT125134. The clinical trial NCT02762981, which studied the drug in combination with nab-paclitaxel in solid tumors, explicitly refers to Relacorilant as CORT125134 in its title.