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Enlicitide Chloride

Phase 1

Healthy | Monoclonal antibody | Metabolic |Merck & Company, Inc.|Last Updated: Aug 19, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials3
Total Enrollment101

FDA Designations

No designations recorded

Clinical trial landscape

Enlicitide Chloride · 4 trials · 3 indications

Phase 1 4
NCT06658626A Study to Evaluate the Metabolism, Excretion, and Mass Balance of [¹⁴C]Enlicitide Chloride ([¹⁴C]MK-0616) in Healthy Participants (MK-0616-016)Healthy
COMPLETED8 Analytics
NCT06814106A Single- and Multiple-Dose Study of Enlicitide Chloride (MK-0616) in Healthy Chinese Adult Participants (MK 0616-010)Healthy
COMPLETED37 Analytics
NCT06655311A Study of Enlicitide Chloride (MK-0616) in Healthy Participants and Participants Taking Statins (MK-0616-012)Healthy
COMPLETED56 Analytics
NCT05070390A Study of Enlicitide Chloride (MK-0616 Oral PCSK9 Inhibitor) in Participants With Moderate Renal Impairment (MK-0616-007)Moderate Renal Impairment
COMPLETED18 Analytics
PHASE1COMPLETED
A Study to Evaluate the Metabolism, Excretion, and Mass Balance of [¹⁴C]Enlicitide Chloride ([¹⁴C]MK-0616) in Healthy Participants (MK-0616-016)
HealthyUnlock trial analytics
PHASE1COMPLETED
A Single- and Multiple-Dose Study of Enlicitide Chloride (MK-0616) in Healthy Chinese Adult Participants (MK 0616-010)
HealthyUnlock trial analytics
PHASE1COMPLETED
A Study of Enlicitide Chloride (MK-0616) in Healthy Participants and Participants Taking Statins (MK-0616-012)
HealthyUnlock trial analytics
PHASE1COMPLETED
A Study of Enlicitide Chloride (MK-0616 Oral PCSK9 Inhibitor) in Participants With Moderate Renal Impairment (MK-0616-007)
Moderate Renal ImpairmentUnlock trial analytics

Study Endpoints

Primary Endpoints

Cumulative Amount of Radioactivity Excreted in Urine (Aeu)
At designated timepoints (up to 15 days)

Urine samples will be collected to determine the Aeu of \[¹⁴C\]enlicitide chloride.

Cumulative Amount of Radioactivity Excreted in Feces (Aef)
At designated timepoints (up to 15 days)

Fecal samples will be collected to determine the Aef of \[¹⁴C\]enlicitide chloride.

Cumulative Percentage of Radioactivity Excreted in Urine (feu)
At designated timepoints (up to 15 days)

Urine samples will be collected to determine the feu of \[¹⁴C\]enlicitide chloride.

Cumulative Percentage of Radioactivity Excreted in Feces (fef)
At designated timepoints (up to 15 days)

Fecal samples will be collected to determine the fef of \[¹⁴C\]enlicitide chloride.

Plasma Enlicitide Chloride: Area Under the Concentration-Time Curve from Time 0 to the Last Measurable Concentration (AUC0-t)
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the AUC0-t of enlicitide chloride.

Plasma Enlicitide Chloride: Area Under the Concentration-Time Curve from Time 0 to Infinity (AUC0-inf)
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the AUC0-inf of enlicitide chloride.

Plasma Enlicitide Chloride: Maximum Plasma Concentration (Cmax)
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the Cmax of enlicitide chloride.

Plasma Enlicitide Chloride: Apparent Terminal Half-life (t1/2)
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the t1/2 of enlicitide chloride.

Plasma Enlicitide Chloride: Time to Maximum Plasma Concentration (Tmax)
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the Tmax of enlicitide chloride.

Plasma Total Reactivity: AUC0-t
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the AUC0-t of total reactivity.

Plasma Total Reactivity: AUC0-inf
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the AUC0-inf of total reactivity.

Plasma Total Reactivity: Cmax
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the Cmax of total reactivity.

Plasma Total Reactivity: t1/2
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the t1/2 of total reactivity.

Plasma Total Reactivity: Tmax
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the Tmax of total reactivity.

Enlicitide Chloride to Total Radioactivity Ratio of Area Under the Concentration-Time Curve from Time 0 to the Last Detectable Sample (enlicitide chloride AUC0-x/total radioactivity AUC0-x)
At designated timepoints (up to 15 days)

Plasma samples will be collected to determine the enlicitide chloride AUC0-x/total radioactivity AUC0-x.

Number of Participants Who Experience an Adverse Event (AE)
Up to approximately 2 months

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

Number of Participants Who Discontinue the Study Treatment Due to an AE
Up to approximately 2 months

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

Number of Participants Who Discontinue Study Treatment Due to an AE
Up to approximately 42 days

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

Area Under the Concentration-Time Curve From Time 0 to Infinity (AUC0-Inf) of MK-0616
Predose and 1, 1.5, 2, 3, 5, 8, 12, 24, 36, 48, 72, 120, 168, 240, and 336 hours postdose

Blood samples were collected at pre-specified timepoints to determine the AUC0-inf of MK-0616. AUC0-inf was defined as the area under the concentration-time curve of MK-0616 from time zero to infinity.

Area Under the Concentration- Time Curve From Time 0 to Last Measurable Concentration (AUC0-last) of MK-0616.
Predose and 1, 1.5, 2, 3, 5, 8, 12, 24, 36, 48, 72, 120, 168, 240, and 336 hours postdose

Blood samples were collected at pre-specified timepoints to determine the AUC0-last of MK-0616. AUC0-last was defined as the area under the concentration-time curve of MK-0616 from time zero to last measurable concentration.

Maximum Plasma Concentration (Cmax) of MK-0616
Predose and 1, 1.5, 2, 3, 5, 8, 12, 24, 36, 48, 72, 120, 168, 240, and 336 hours postdose

Blood samples were collected at pre-specified time points to determine the Cmax of MK-0616. Cmax was defined as the maximum concentration of MK-0616 reached.

Time to Maximum Plasma Concentration (Tmax) of MK-0616
Predose and 1, 1.5, 2, 3, 5, 8, 12, 24, 36, 48, 72, 120, 168, 240, and 336 hours postdose

Blood samples were collected at pre-specified timepoints to determine the Tmax of MK-0616. Tmax was defined as time to the maximum concentration of MK-0616 reached.

Apparent Terminal Half-life (t1/2) of MK-0616
Predose and 1, 1.5, 2, 3, 5, 8, 12, 24, 36, 48, 72, 120, 168, 240, and 336 hours postdose

Blood samples were collected at pre-specified timepoints to determine the t1/2 of MK-0616. t1/2 was defined as the time required to divide the MK-0616 plasma concentration by two after reaching pseudo-equilibrium, following a single dose of MK-0616.

Apparent Clearance (CL/F) of MK-0616
Predose and 1, 1.5, 2, 3, 5, 8, 12, 24, 36, 48, 72, 120, 168, 240, and 336 hours postdose

Blood samples were collected at pre-specified timepoints to determine the CL/F of MK-0616. CL/F was the apparent total clearance of MK-0616 in plasma over time, assessed as the rate at which MK-0616 was removed from the plasma.

Apparent Volume of Distribution (Vz/F) of MK-0616
Predose and 1, 1.5, 2, 3, 5, 8, 12, 24, 36, 48, 72, 120, 168, 240, and 336 hours postdose

Blood samples were collected at pre-specified timepoints to determine the Vz/F of MK-0616. Vz/F was the apparent volume of distribution of MK-0616 between the plasma and the rest of the body, after dose, assessed as the total volume of MK-0616 that would need to be uniformly distributed to achieve the desired plasma drug concentration.

Secondary Endpoints

Number of Participants Who Experience an Adverse Event (AE)
Up to approximately 29 days
Number of Participants Who Discontinue the Study Due to an AE
Up to approximately 29 days
Panels A and B: Area Under the Concentration-Time Curve from 0 to Infinity (AUC0-inf) of Enlicitide Chloride
Predose and at designated timepoints (up to 8 days postdose)
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
[¹⁴C]Enlicitide chlorideEXPERIMENTALParticipants will receive a single dose of \[¹⁴C\]enlicitide chloride on Day 1.
Enlicitide Chloride Panel AEXPERIMENTALPeriod 1: Participants will receive a single dose of enlicitide chloride dose 1 or a single dose of placebo on Day 1 on an empty stomach (after a ≥8-hour overnight fast). Period 2: Participants will receive a single dose of enlicitide chloride dose 1 or a single dose of placebo on Day 1 on an empty stomach (after a ≥8-hour overnight fast) followed by a standard breakfast.
Enlicitide Chloride Panel BEXPERIMENTALPeriod 1: Participants will receive a single dose of enlicitide chloride dose 2 or a single dose of placebo on Day 1 on an empty stomach (after a ≥8-hour overnight fast). Period 2: Participants will receive a single dose of enlicitide chloride dose 3 or a single dose of placebo on Day 1 on an empty stomach (after a ≥8-hour overnight fast).
Enlicitide Chloride Panel CEXPERIMENTALParticipants will receive enlicitide chloride dose 2 or placebo once daily for 14 days on an empty stomach (after a ≥8-hour overnight fast).
Enlicitide ChlorideEXPERIMENTALParticipants receive enlicitide chloride titrated orally from Dose 1, Dose 2, or Dose 3 once daily (QD) over the course of a 14-day treatment for each dose based on the safety and tolerability of the previous starting dose. The total treatment duration is up to approximately 6 weeks.
PlaceboPLACEBO_COMPARATORParticipants receive placebo orally for up to approximately 6 weeks.
Panel A - Moderate Renal Impairment (RI)EXPERIMENTALSingle dose of enlicitide chloride 10 mg
Panel B - Healthy ControlsEXPERIMENTALSingle dose of enlicitide chloride 10 mg

Interventions

NameTypeDescription
[¹⁴C]Enlicitide chlorideDRUGIV Injection
Enlicitide ChlorideDRUGOral Capsule
PlaceboDRUGPlacebo oral capsule matching enlicitide chloride
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Eligibility Criteria

Age Range18 Years to 60 Years
SexMALE
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Is in good health. * Has a body mass index ≥18 and ≤32 kg/m\^2, inclusive. Exclusion Criteria: * Has a history of cancer. * Has positive tests for hepatitis B surface antigen, hepatitis C antibodies or human immunodeficiency virus.

Countries:United StatesChina
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Frequently asked questions about Enlicitide Chloride

What is Enlicitide Chloride used for?

Enlicitide Chloride is an investigational oral PCSK9 inhibitor being studied for use in healthy participants, participants with moderate renal impairment, and participants with hypercholesterolemia. It is being developed by Merck & Company, Inc. (MRK) as a potential treatment for conditions related to cholesterol metabolism.

What does Enlicitide Chloride target?

Enlicitide Chloride targets PCSK9, a protein that regulates cholesterol levels by controlling the degradation of LDL receptors. By inhibiting PCSK9, the drug aims to increase the availability of LDL receptors on liver cells, thereby enhancing the clearance of LDL cholesterol from the blood.

Who makes Enlicitide Chloride?

Enlicitide Chloride is being developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. The company is conducting clinical trials to evaluate the drug's safety, tolerability, and pharmacokinetics in various patient populations.

What phase is Enlicitide Chloride in?

Enlicitide Chloride is in Phase 1 clinical development. All four completed trials for the drug are Phase 1 studies, meaning it is still in the early stages of clinical testing and has not yet been evaluated in later-phase efficacy trials.

What clinical trials is Enlicitide Chloride in?

Enlicitide Chloride has been studied in four completed Phase 1 trials: NCT05070390 in participants with moderate renal impairment, NCT06655311 in healthy participants and those taking statins, NCT06658626 a mass balance study in healthy males, and NCT06814106 in healthy Chinese adult participants.

Is Enlicitide Chloride the same as MK-0616?

Yes, Enlicitide Chloride is also known as MK-0616. Clinical trial records refer to the drug as both Enlicitide Chloride and MK-0616, with some studies titled 'A Study of Enlicitide Chloride (MK-0616 Oral PCSK9 Inhibitor)' and others using the MK-0616 designation.