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TERN-701

Phase 1/2

Healthy | Small molecule | Other |Merck & Company, Inc.|Last Updated: Sep 24, 2026

Development status

Highest phase Phase 1/2 run by Terns, Inc. (NCT06163430)
Phase scored for MRKPhase 1
Registered trials 3 across 2 sponsors since Sep 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLEDBiomarker
Total Trials2
Total Enrollment204

FDA Designations

ORPHAN_DRUG

Clinical trial landscape

TERN-701 · 2 trials · 1 indication

Phase 1 2
NCT07839000A Clinical Trial to Evaluate [14C]-MK-4208/[14C]-TERN-701 in Healthy Adult Male Participants (MK-4208-002/TERN701-1016)Healthy
COMPLETED8 Analytics
NCT07838987A Clinical Trial to Evaluate MK-4208/TERN-701 in Healthy Adult Participants (MK-4208-001/TERN701-1014)Healthy
COMPLETED196 Analytics
PHASE1COMPLETED
A Clinical Trial to Evaluate [14C]-MK-4208/[14C]-TERN-701 in Healthy Adult Male Participants (MK-4208-002/TERN701-1016)
HealthyUnlock trial analytics
PHASE1COMPLETED
A Clinical Trial to Evaluate MK-4208/TERN-701 in Healthy Adult Participants (MK-4208-001/TERN701-1014)
HealthyUnlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of Total Amount of [14C]-Radiolabel Excreted into Urine per Sampling Interval (Aeurine,14C,t1-t2)
Pre-dose and at designated time points up to 408 hours post dose

Urine will be collected to determine the Aeurine,14C,t1-t2 of radiolabeled \[14C\]-TERN-701.

Cumulative Percentage of Total Amount of [14C]-Radiolabel Excreted into Urine up to the Last Sampling Interval (Aeurine,14C)
Pre-dose and at designated time points up to 408 hours post dose

Urine will be collected to determine the Aeurine,14C of radiolabeled \[14C\]-TERN-701.

Percentage of Total Amount of [14C]-Radiolabel Excreted into Feces per Sampling Interval (Aefeces,14C,t1-t2)
Pre-dose and at designated time points up to 408 hours post dose

Feces will be collected to determine the Aefeces,14C,t1-t2 of radiolabeled \[14C\]-TERN-701.

Cumulative Percentage of Total Amount of [14C]-Radiolabel Excreted into Feces Up to the Last Sampling Interval (Aefeces,14C)
Pre-dose and at designated time points up to 408 hours post dose

Feces will be collected to determine the Aefeces,14C of radiolabeled \[14C\]-TERN-701.

Percentage of Total Amount of [14C]-Radiolabel Excreted from Body per Sampling Interval (Aetotal, 14C, t1-t2)
Pre-dose and at designated time points up to 408 hours post dose

Urine and Feces will be collected to determine the Aetotal,14C,t1-t2 of radiolabeled \[14C\]-TERN-701.

Cumulative Percentage of Total Excretion of [14C]-Radiolabel from the Body (Aetotal, 14C)
Pre-dose and at designated time points up to 408 hours post dose

Urine and Feces will be collected to determine the Aetotal,14C of radiolabeled \[14C\]-TERN-701. Calculated as, Aetotal,14C= Aeurine,14C +Aefeces,14C.

Maximum Concentration Observed in Plasma (Cmax) of TERN-701 in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the Cmax of TERN-701.

Time to Maximum Concentration Observed in Plasma (Tmax) of TERN-701 in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the Tmax of TERN-701.

Apparent Terminal Half-Life (t1/2) of TERN-701 in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the t1/2 of TERN-701.

Area Under the Concentration-Time Curve from Time 0 to the Last Quantifiable Concentration (AUC0-last) of TERN-701 in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the AUC0-Last of TERN-701.

Area Under the Concentration-Time Curve from Time 0 Extrapolated to Infinity (AUC0-Inf) of TERN-701 in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the AUC0-inf of TERN-701.

Apparent Oral Clearance (CL/F) of TERN-701 in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the CL/F of TERN-701.

Apparent Volume of Distribution (Vz/F) of TERN-701 in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the Vz/F of TERN-701.

Total [14C]-Radiolabel in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the Total \[14C\]-Radiolabel, calculated as the AUCinf of non-radiolabeled TERN-701 in plasma divided by the AUCinf of total \[14C\]-radiolabel in plasma.

Tmax of Total [14C]-Radiolabel in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the Tmax of radiolabeled \[14C\]-TERN-701.

t1/2 of Total [14C]-Radiolabel in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the t1/2 of radiolabeled \[14C\]-TERN-701.

AUC0-last of Total [14C]-Radiolabel in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the AUC0-last of radiolabeled \[14C\]-TERN-701.

AUC0-Inf of Total [14C]-Radiolabel in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the AUC0-Inf of radiolabeled \[14C\]-TERN-701.

Cmax of Total [14C]-Radiolabel in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the Cmax of radiolabeled \[14C\]-TERN-701.

Tmax of Total [14C]-Radiolabel in Whole Blood
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the Tmax of radiolabeled \[14C\]-TERN-701.

t1/2 of Total [14C]-Radiolabel in Whole Blood
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the t1/2 of radiolabeled \[14C\]-TERN-701.

AUC0-last of Total [14C]-Radiolabel in Whole Blood
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the AUC0-last of radiolabeled \[14C\]-TERN-701.

AUC0-Inf of Total [14C]-Radiolabel in Whole Blood
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the AUC0-Inf of radiolabeled \[14C\]-TERN-701.

Cmax of Total [14C]-Radiolabel in Whole Blood
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the Cmax of radiolabeled \[14C\]-TERN-701.

Cumulative Amount of Total [14C]-Radiolabel Excreted in Urine (Aeurine)
Pre-dose and at designated time points up to 408 hours post dose

Urine samples will be collected to determine the Aeurine of radiolabeled \[14C\]-TERN-701.

Renal Clearence (CLr) of [14C] radioactivity
Pre-dose and at designated time points up to 408 hours post dose

Urine samples will be collected to determine the CLr of radiolabeled \[14C\]-TERN-701.

Percent of Dose Excreted as Radioactivity in Urine (%Feurine) of [14C] radioactivity
Pre-dose and at designated time points up to 408 hours post dose

Urine samples will be collected to determine the %Feurine of radiolabeled \[14C\]-TERN-701.

Cumulative Amount of Total [14C]-Radiolabel Excreted in Feces (Aefeces) of [14C] radioactivity
Pre-dose and at designated time points up to 408 hours post dose

Feces samples will be collected to determine the Aefeces of radiolabeled \[14C\]-TERN-701.

Percent of Dose Excreted as Radioactivity in Feces (%Fefeces) of [14C] radioactivity
Pre-dose and at designated time points up to 408 hours post dose

Feces samples will be collected to determine the %Fefeces of radiolabeled \[14C\]-TERN-701.

Percentage Area Under the Concentration-Time Curve (AUC) of [14C]-Radiolabel TERN-701 Metabolite in Plasma
Pre-dose and at designated time points up to 408 hours post dose

Blood samples will be collected to determine the Percentage of AUC of \[14C\]-radiolabel TERN-701 metabolite in plasma.

Percentage of Administered Dose of [14C]-Radiolabel TERN-701 Metabolite in Feces
Pre-dose and at designated time points up to 408 hours post dose

Feces samples will be collected to determine the percentage of administered dose of \[14C\]-radiolabel TERN-701 metabolite in feces.

Percentage of the [14C]-Radiolabel TERN-701 Metabolite in Urine
Pre-dose and at designated time points up to 408 hours post dose

Urine samples will be collected to determine the percentage of \[14C\]-radiolabel TERN-701 metabolite in urine.

Number of Participants Who Experience a Treatment Emergent Adverse Event (AE)
Up to approximately 102 days

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants who experience a treatment emergent AE will be reported.

Number of Participants Who Discontinue Study Treatment Due to an AE
Up to approximately 102 days

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants who discontinue study treatment due to an AE will be reported.

Number of Participants with Clinically Significant Abnormalities in Systolic Blood Pressure
up to approximately 102 days

Blood pressure will be measured after the participant has been at rest in a supine position for at least 10 minutes. Blood pressure and pulse measurements will be assessed with a completely automated device; manual techniques will be used only if an automated device is not available. Blood pressure measurements will be carried out before blood sample collections or at least 30 minutes after any blood draws.

Number of Participants with Clinically Significant Abnormalities in Diastolic Blood Pressure
up to approximately 102 days

Blood pressure will be measured after the participant has been at rest in a supine position for at least 10 minutes. Blood pressure and pulse measurements will be assessed with a completely automated device; manual techniques will be used only if an automated device is not available. Blood pressure measurements will be carried out before blood sample collections or at least 30 minutes after any blood draws.

Number of Participants with Abnormal Clinical Hematology Test Results Reported as Adverse Events
up to approximately 102 days

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants with abnormal hematology-related AEs will be reported.

Number of Participants with Abnormal Clinical Chemistry Test Results Reported as Adverse Events
up to approximately 102 days

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants with abnormal chemistry-related AEs will be reported.

Number of Participants with Abnormal Urinalysis Results Reported as Adverse Events
up to approximately 102 days

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants with abnormal urinalysis-related AEs will be reported.

Number of Participants with Clinically Significant Abnormalities in 12-Lead (ECG) Findings
up to approximately 102 days

During the 12-lead ECG collection participants will be instructed to lie supine for at least 10 minutes prior to ECG collection. During the collection, participants should be in a quiet setting, without distractions, and should refrain from talking or moving their arms or legs. All ECG acquisitions will be carried out before any blood sample collections or at least 30 minutes after any blood draws.

Area Under the Concentration versus Time Curve from Time 0 to the Last Quantifiable Concentration (AUC0-last) of TERN-701 in Plasma
Pre-dose and at designated time points up to 96 hours post dose

Blood samples will be collected to determine the AUC0-Last of TERN-701.

Area Under the Concentration versus Time Curve Extrapolated to Infinite Time (AUC0-Inf) of TERN-701 in Plasma
Pre-dose and at designated time points up to 96 hours post dose

Blood samples will be collected to determine the AUC0-inf of TERN-701.

Area Under the Concentration versus Time Curve Over the Dosing Interval (AUCtau) of TERN-701 in Plasma
Pre-dose and at designated time points up to 24 hours post dose

Blood samples will be collected to determine the AUCtau of TERN-701.

Maximum Observed Concentration of Drug (Cmax) of TERN-701 in Plasma
Pre-dose and at designated time points up to 96 hours post dose

Blood samples will be collected to determine the Cmax of TERN-701.

Apparent Terminal Elimination Half-Life (t1/2) of TERN-701 in Plasma
Pre-dose and at designated time points up to 96 hours post dose

Blood samples will be collected to determine the t1/2 of TERN-701.

Time of Maximum Observed Concentration of Drug (Tmax) of TERN-701 in Plasma
Pre-dose and at designated time points up to 96 hours post dose

Blood samples will be collected to determine the Tmax of TERN-701.

Secondary Endpoints

Mean concentration of [14C]-TERN-701 Elimination
Pre-dose and at designated time points up to 408 hours post dose
Rate of Elimination of [14C]-TERN-701
Pre-dose and at designated time points up to 408 hours post dose
Whole Blood to Plasma Total [14C]-Radiolabel AUC Ratio
Pre-dose and at designated time points up to 408 hours post dose
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
[14C]-TERN-701EXPERIMENTALParticipants receive a single oral dose of radiolabeled TERN-701 (\[14C\]-TERN-701) on Day 1.
Cohort 1: Single Ascending Dose (SAD) Escalation of TERN-701 Dose Level 1EXPERIMENTALParticipants receive a single oral dose of TERN-701 Dose Level 1 under fasted conditions on Day 1.
Cohort 2: SAD Escalation of TERN-701 Dose Level 2EXPERIMENTALParticipants receive a single oral dose of TERN-701 Dose Level 2 under fasted conditions on Day 1.
Cohort 3: SAD Escalation of TERN-701 Dose Level 3 and Food EffectEXPERIMENTALOn Period 1 Day 1, participants receive a single oral dose of TERN-701 Dose Level 3 under fasted conditions. On Period 2 Day 1, participants receive TERN-701 Dose Level 3 after a high-fat meal.
Cohort 4: SAD Escalation of TERN-701 Dose Level 4EXPERIMENTALParticipants receive a single oral dose of TERN-701 Dose Level 4 under fasted conditions on Day 1.
Cohort 5: SAD Escalation of TERN-701 Dose Level 5EXPERIMENTALParticipants receive a single oral dose of TERN-701 Dose Level 5 under fasted conditions on Day 1.
Cohort 6: SAD Escalation of TERN-701 Dose Level 7EXPERIMENTALParticipants receive a single oral dose of TERN-701 Dose Level 7 under fasted conditions on Day 1.
Cohort 7: TERN-701 Formulations with Rabeprazole 20 mgEXPERIMENTALParticipants in Cohort 7 are randomized to receive TERN-701 Formulation 1 or Formulation 2 at Dose Level 5 on Day 1. On Day 7, participants receive TERN-701 Formulation 2 or Formulation 1 at Dose Level 5. Participants also receive Rabeprazole 20 mg once daily on Days 10-13. On Day 14, participants will co-administer a single oral dose of Rabeprazole 20 mg with TERN-701 Formulation 1 Dose Level 5 at the same time. All participants receive treatment under fasted conditions.
Cohort 8: TERN-701 + Probe Substrate Cocktail-1EXPERIMENTALPer protocol, the probe substrate cocktail-1 consists of midazolam 2 mg, digoxin 0.25 mg, pravastatin 40 mg, montelukast 10 mg, and omeprazole 40 mg. On Day 1, participants receive a single oral dose of the probe substrate cocktail-1 under fasted conditions. On Day 5, participants receive a single oral dose of TERN-701 Dose Level 4 co-administered with a single oral dose of the probe substrate cocktail-1 taken at the same time under fasted conditions. On Day 9, participants receive a single oral dose of TERN-701 Dose Level 7 co-administered with a single oral dose of the probe substrate cocktail-1 taken at the same time under fasted conditions.
Cohort 9: TERN-701 Dose Level 5 + Rabeprazole 20 mgEXPERIMENTALParticipants receive a single oral dose of TERN-701 Dose Level 5 on Day 1 under fasted conditions. On Days 4-7 participants will receive Rabeprazole 20 mg once daily under fasted conditions. On Day 8, under fasted conditions, participants co-administer a single oral dose of TERN-701 Dose Level 5 with a single oral dose of Rabeprazole 20 mg taken at the same time under fasted conditions.
Cohort 10: SAD Escalation of TERN-701 Dose Level 8EXPERIMENTALParticipants receive a single oral dose of TERN-701 Dose Level 8 under fasted conditions on Day 1.
Cohort 11: SAD Escalation of TERN-701 Dose Level 9EXPERIMENTALParticipants receive a single oral dose of TERN-701 Dose Level 9 under fasted conditions on Day 1.
Cohort 12: TERN-701 Dose Level 3 + Itraconazole 200 mgEXPERIMENTALParticipants receive a single oral dose of TERN-701 at Dose Level 3 under nonfasted conditions on Day 1. On Day 8, participants will receive Itraconazole 200 mg twice daily after a standardized breakfast and evening snack. On Days 9-11, participants will take a single oral dose of Itraconazole 200 mg after a standardized meal. On Day 12, participants will take a single dose of Itraconazole 200mg after a standardized meal followed by TERN-701 Dose Level 3 taken an hour later. Participants will continue taking a single oral dose of Itraconazole 200 mg once daily after a standardized meal on Days 13-15.
Cohort 13: Multiple Ascending Dose (MAD) Escalation of TERN-701 Dose Level 4EXPERIMENTALParticipants receive an oral dose of TERN-701 Dose Level 4 once daily from Day 1 to Day 13 under fasted conditions.
Cohort 14: TERN-701 Dose Level 5 + Probe Substrate Cocktail-2EXPERIMENTALPer protocol, the probe substrate cocktail-2 consists of midazolam 2 mg, warfarin 5 mg, and rosuvastatin 10 mg. Participants receive a single oral dose of the Probe Substrate Cocktail-2 on Day 1 under fasted conditions. On Days 9-15, participants receive a single oral dose of TERN-701 Dose Level 5 once daily under fasted conditions. On Day 16, participants receive a single oral dose of the Probe Substrate Cocktail-2 co-administered with TERN-701 Dose Level 5 taken at the same time under fasted conditions. On Days 17-21 participants receive TERN-701 Dose Level 5 as a single oral dose once daily under fasted conditions.
Cohort 15: TERN-701 Dose Level 8 + Probe Substrate Cocktail-2EXPERIMENTALPer protocol, the probe substrate cocktail-2 consists of midazolam 2 mg, warfarin 5 mg, and rosuvastatin 10 mg. Participants receive a single oral dose of the Probe Substrate Cocktail-2 on Day 1 under fasted conditions. On Days 9-15, participants receive a single oral dose of TERN-701 Dose Level 8 once daily under fasted conditions. On Day 16, participants receive a single oral dose of the Probe Substrate Cocktail-2 co-administered with TERN-701 Dose Level 8 taken at the same time under fasted conditions. On Days 17-21 participants receive TERN-701 Dose Level 8 as a single oral dose once daily under fasted conditions.
Cohort 16: Food Effect on TERN-701 Dose Level 8 Formulations with Rabeprazole 20 mgEXPERIMENTALOn Period 1 Day 1, participants receive a single oral dose of TERN-701 Formulation 3 Dose Level 8. On Period 1 Day 7, participants receive a single oral dose of TERN-701 Formulation 4 Dose Level 8. On Period 1 Day 13, participants receive a single oral dose of TERN-701 Formulation 5 Dose Level 8. On Period 1 Day 19, participants receive a single oral dose of TERN-701 Formulation 6 Dose Level 8. All Period 1 treatments are administered under fasted conditions. Per protocol, following Period 1, one formulation is selected for Period 2. On Period 2 Day 1, participants receive a single oral dose of the selected TERN-701 formulation Dose Level 8 after a high-fat meal. On Period 2 Days 7-10, participants receive rabeprazole 20 mg once daily under fasted conditions. On Period 2 Day 11, participants receive the selected formulation of TERN-701 Dose Level 8 as a single oral dose, co-administered with the single oral dose of Rabeprazole 20 mg taken at the same time under fasted conditions.
Cohort 17: Food Effect on TERN-701 Dose Level 8 Selected Formulation with Rabeprazole 20 mgEXPERIMENTALPer protocol, a formulation from Cohort 16 Period 1, different from the formulation selected for Cohort 16 Period 2, may be selected to evaluate the effects of food and rabeprazole 20 mg. On Day 1, participants receive a single oral dose of the selected formulation of TERN-701 Dose Level 8 under fasted conditions. On Day 7, participants receive a single oral dose of the selected formulation of TERN-701 Dose Level 8 after a high-fat meal. On Days 13-16, participants receive a single oral dose of rabeprazole 20 mg once daily. On Day 17, participants receive a single oral dose of the selected formulation of TERN-701 Dose Level 8 co-administered with a single oral dose of rabeprazole 20 mg taken at the same time under fasted conditions.
Cohort 18: TERN-701 Dose Level 8 + Bosentan 125 mgEXPERIMENTALOn Day 1, participants receive a single oral dose of TERN-701 Dose Level 8 under fasted conditions. Beginning on Day 8, participants receive an oral dose of Bosentan 125 mg twice daily. On Day 15, participants receive TERN-701 Dose Level 8 as a single oral dose co-administered with the morning dose of Bosentan 125 mg taken at the same time under fasted conditions; participants then receive the second daily dose of Bosentan 125 mg in the evening. Participants continue taking Bosentan 125 mg twice daily on Days 16-18.
Cohort 19: TERN-701 Dose Level 6 + Quinidine 300 mgEXPERIMENTALParticipants receive a single oral dose of TERN-701 Dose Level 6 on Day 1 under fasted conditions. Beginning on Day 6, participants receive an oral dose of Quinidine 300 mg three times daily. On Day 8, participants receive TERN-701 Dose Level 6 as a single oral dose co-administered with the morning final dose of Quinidine 300 mg taken at the same time under fasted conditions.

Interventions

NameTypeDescription
TERN-701DRUGOral Liquid radiolabeled with \[14C\]-TERN-701
RabeprazoleDRUGThe United States commercially marketed 20 mg oral tablet formulation is being used in this trial.
MidazolamDRUG2 mg oral syrup formulation administered as part of the probe substrate cocktail-1 and probe substrate cocktail-2. The United States commercially marketed formulation is being used in this trial.
DigoxinDRUG0.25 mg oral tablet formulation administered as part of the probe substrate cocktail-1. The United States commercially marketed formulation is being used in this trial.
PravastatinDRUG40 mg oral tablet formulation administered as part of the probe substrate cocktail-1. The United States commercially marketed formulation is being used in this trial.
MontelukastDRUG10 mg oral tablet formulation administered as part of the probe substrate cocktail-1. The United States commercially marketed formulation is being used in this trial.
OmeprazoleDRUG40 mg oral tablet formulation administered as part of the probe substrate cocktail-1. The United States commercially marketed formulation is being used in this trial.
ItraconazoleDRUGThe United States commercially marketed 200 mg oral capsule formulation is being used in this trial.
WarfarinDRUG5 mg oral tablet formulation administered as part of the probe substrate cocktail-2. The United States commercially marketed formulation is being used in this trial.
RosuvastatinDRUG10 mg oral tablet formulation administered as part of the probe substrate cocktail-2. The United States commercially marketed formulation is being used in this trial.
BosentanDRUGThe Europe commercially marketed 125 mg oral tablet formulation is being used in this trial.
QuinidineDRUGThe United States commercially marketed 300 mg oral tablet formulation is being used in this trial.
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Eligibility Criteria

Age Range18 Years to 55 Years
SexMALE
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Has body mass index (BMI) ≥18.5 and ≤32.0 kg/m\^2 * Is in good health Exclusion Criteria: The main exclusion criteria include but are not limited to the following: * Has history or presence of any me...

Countries:United States
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