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TERN-701

Phase 1/2

Undisclosed | Small Molecules | Other |Merck & Company, Inc.|Trials Updated: Sep 24, 2026

TERN-701 development status

Highest phase Phase 1/2 run by Terns, Inc., a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA) (NCT06163430)
Phase scored for MRKPhase 1
Registered trials 2 across 1 sponsor since Dec 2023

TERN-701 target and mechanism

ModalitySmall Molecules

Also known as MK-4208, HS-10382

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment8

FDA Designations

No designations recorded

TERN-701 clinical trials

TERN-701 · 1 trial · 1 indication

Phase 1 1
NCT07839000A Clinical Trial to Evaluate [14C]-MK-4208/[14C]-TERN-701 in Healthy Adult Male Participants (MK-4208-002/TERN701-1016)Healthy
COMPLETED8 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

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.

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.

Interventions

NameTypeDescription
TERN-701DRUGOral Liquid radiolabeled with \[14C\]-TERN-701
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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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Recent Changes (Last 90 Days)

MEDIUMOct 25, 2026NCT07839000TRIAL_REMOVED: changed
MEDIUMOct 25, 2026NCT07839000TRIAL_REMOVED: changed
MEDIUMOct 25, 2026NCT07839000TRIAL_REMOVED: changed

Frequently asked questions about TERN-701

What is TERN-701?

TERN-701 is an investigational small molecule developed by Merck & Company, Inc. (ticker MRK). It has been studied in a Phase 1 clinical trial in healthy adult male participants. Its therapeutic indications have not been disclosed.

Who makes TERN-701?

TERN-701 is developed by Merck & Company, Inc., which trades under the ticker MRK. The Phase 1 trial of the compound was registered under the code MK-4208-002/TERN701-1016, linking the TERN-701 designation with Merck's MK-4208 numbering.

What phase is TERN-701 in?

TERN-701 is in Phase 1 clinical development. One Phase 1 trial has been completed, and no active trials are currently listed. The compound is investigational and is not described as approved for any indication.

What clinical trials is TERN-701 in?

TERN-701 has been evaluated in one completed Phase 1 trial, NCT07839000, titled a clinical trial to evaluate [14C]-MK-4208/[14C]-TERN-701 in healthy adult male participants. The trial enrolled 8 healthy male volunteers aged 18 years and older in the United States and was uncontrolled.

What was the design of the TERN-701 Phase 1 trial?

The completed Phase 1 trial, NCT07839000, was an uncontrolled study with no randomization and no blinding. It enrolled 8 healthy adult male participants aged 18 years and older at sites in the United States, and it was not biomarker selected.