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MK-6552

Phase 1

Healthy | Small molecule | Neurology |Merck & Company, Inc.|Last Updated: Oct 30, 2024

Success Probability

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials3
Total Enrollment44

FDA Designations

No designations recorded

Clinical trial landscape

MK-6552 · 3 trials · 2 indications

Phase 1 3
NCT06662396A Study of Diltiazem With a Single Dose of MK-6552 in Healthy Adult Participants (MK-6552-007)Healthy
COMPLETED14 Analytics
NCT06619665A Study of MK-6552 in Sleep Deprived Healthy Participants (MK-6552-003)Healthy
COMPLETED18 Analytics
NCT06665230A Clinical Study of MK-6552 and Modafinil in Healthy Men (MK-6552-005)Healthy
COMPLETED12 Analytics
PHASE1COMPLETED
A Study of Diltiazem With a Single Dose of MK-6552 in Healthy Adult Participants (MK-6552-007)
HealthyUnlock trial analytics
PHASE1COMPLETED
A Study of MK-6552 in Sleep Deprived Healthy Participants (MK-6552-003)
HealthyUnlock trial analytics
PHASE1COMPLETED
A Clinical Study of MK-6552 and Modafinil in Healthy Men (MK-6552-005)
HealthyUnlock trial analytics

Study Endpoints

Primary Endpoints

Maximum Plasma Concentration (Cmax) of MK-6552
Pre-dose and at designated time points up to 24 hours post dose

Blood samples will be collected to determine the Cmax of MK-6552 in plasma.

Participants with an Adverse Event (AE)
Up to Day 30

Percentage of participants with at least one AE

Participants who discontinued from study due to an AE
Day 1

Percentage of participants who discontinued from study due to an AE

Maintenance of Wakefulness Test (MWT) for MK-6552
Postdose time to maximum plasma concentration (Tmax) (at designated timepoints up to 24 hours postdose)

Sleep latency of MWT for MK-6552 compared with placebo

Number of Participants Who Experience an Adverse Event (AE)
Up to approximately 1 month

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 19 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.

High Dose Modafinil Effect: Area Under the Concentration-Time Curve from Time 0 to Infinity (AUC0-inf) of MK-6552
At designated timepoints (up to approximately 36 hours postdose)

Blood samples will be collected to determine the AUC0-inf of MK-6552 in the presence of high dose modafinil.

High Dose Modafinil Effect: Area Under the Concentration-Time Curve from Time 0 to 24 hours (AUC0-24hrs) of MK-6552
At designated timepoints (up to approximately 24 hours postdose)

Blood samples will be collected to determine the AUC0-24hrs of MK-6552 in the presence of high dose modafinil.

High Dose Modafinil Effect: Time to Maximum Plasma Concentration (Tmax) of MK-6552
At designated timepoints (up to approximately 36 hours postdose)

Blood samples will be collected to determine the Tmax of MK-6552 in the presence of high dose modafinil.

High Dose Modafinil Effect: Maximum Plasma Concentration (Cmax) of MK-6552
At designated timepoints (up to approximately 36 hours postdose)

Blood samples will be collected to determine the Cmax of MK-6552 in the presence of high dose modafinil.

High Dose Modafinil Effect: Plasma Concentration of MK-6552 at 6 Hours Postdose (C6hrs)
At designated timepoints (up to approximately 6 hours postdose)

Blood samples will be collected to determine the C6hrs of MK-6552 in the presence of high dose modafinil.

High Dose Modafinil Effect: Plasma Concentration of MK-6552 at 8 Hours Postdose (C8hrs)
At designated timepoints (up to approximately 8 hours postdose)

Blood samples will be collected to determine the C8hrs of MK-6552 in the presence of high dose modafinil

High Dose Modafinil Effect: Apparent Clearance (CL/F) of MK-6552
At designated timepoints (up to approximately 36 hours postdose)

Blood samples will be collected to determine the CL/F of MK-6552 in the presence of high dose modafinil.

High Dose Modafinil Effect: Apparent Volume of Distribution During Terminal Phase (Vz/F) of MK-6552
At designated timepoints (up to approximately 36 hours postdose)

Blood samples will be collected to determine the Vz/F of MK-6552 in the presence of high dose modafinil.

High Dose Modafinil Effect: Apparent Terminal Half-life (t1/2) of MK-6552
At designated timepoints (up to approximately 36 hours postdose)

Blood samples will be collected to determine the t1/2 of MK-6552 in the presence of high dose modafinil.

Secondary Endpoints

Number of Participants Who Experience and Adverse Event (AEs)
Up to approximately 20 days
Number of Participants Who Discontinue Study Due to an AE
Up to approximately 20 days
Area Under the Concentration-Time Curve from Time 0 to Infinity (AUC0-inf) of MK-6552
Pre-dose and at designated time points up to 96 hours post dose
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
MK-6552 + DiltiazemEXPERIMENTALParticipants receive a single dose of MK-6552 on Period 1 Day 1. Participants receive a Diltiazem every day (QD) for 6 days (Period 2 Days 1-6). On Period 2 Day 2 participants receive a single dose of MK-6552.
MK-6552-Placebo-ModafinilEXPERIMENTALParticipants were treated in period 1 with MK-6552; in period 2 with placebos to Modafinil and MK-6552; and in period 3 with Modafinil; with a 7-day washout between each period.
MK-6552-Modafinil-PlaceboEXPERIMENTALParticipants were treated in period 1 with MK-6552; in period 2 with Modafinil; and in period 3 with placebos to Modafinil and MK-6552; with a 7-day washout between each period.
Placebo-Modafinil-MK-6552EXPERIMENTALParticipants were treated in period 1 with placebos to Modafinil and MK-6552; in period 2 with Modafinil; and in period 3 with MK-6552; with a 7-day washout between each period.
Placebo-MK-6552-ModafinilEXPERIMENTALParticipants were treated in period 1 with placebos to Modafinil and MK-6552; in period 2 with MK-6552; and in period 3 with Modafinil; with a 7-day washout between each period.
Modafinil-MK-6552-PlaeboEXPERIMENTALParticipants were treated in period 1 with Modafinil; in period 2 withMK-6552; and in period 3 with placebos to Modafinil and MK-6552; with a 7-day washout between each period.
Modafinil-Plaebo-MK-6552EXPERIMENTALParticipants were treated in period 1 with Modafinil; in period 2 with placebos to Modafinil and MK-6552; and in period 3 with MK-6552; with a 7-day washout between each period.
MK-6552 + ModafinilEXPERIMENTALIn Period 1, participants receive MK-6552 orally. In Period 2, participants receive MK-6552 orally plus low dose modafinil orally. In Period 3, participants receive MK-6552 orally plus high dose modafinil orally.

Interventions

NameTypeDescription
MK-6552DRUGOral Gelatin Coated Capsule
DiltiazemDRUGOral Extended-Release Capsule
MK-6552 placeboDRUGMK-6552 placebo gelatin coated capsules taken orally two times 8 hours apart
ModafinilDRUGModafinil tablet taken once orally
Modafinil placeboDRUGModafinil placebo tablet taken once orally
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Eligibility Criteria

Age Range18 Years to 55 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Is in good health before randomization * Body Mass Index (BMI) between 18 and 32 kg/m\^2, inclusive Exclusion Criteria: The main exclusion criteria include but are not limited to the following: * His...

Countries:United States
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Frequently asked questions about MK-6552

What is MK-6552 used for?

MK-6552 is an investigational small molecule being developed by Merck & Company, Inc. (MRK) for neurology, studied in healthy participants and in conditions such as narcolepsy. It is currently in Phase 1 clinical development, with completed trials evaluating its effects in sleep-deprived healthy participants and in combination with other drugs.

Who makes MK-6552?

MK-6552 is being developed by Merck & Company, Inc., which trades under the ticker symbol MRK. The company is conducting Phase 1 clinical trials of this investigational small molecule in the United States, focusing on neurology and healthy volunteer studies.

What phase is MK-6552 in?

MK-6552 is in Phase 1 clinical development. It is an investigational drug, not yet approved, and all three of its clinical trials have been completed. These trials enrolled a total of 44 participants and were randomized, double-blind, and controlled studies.

What clinical trials is MK-6552 in?

MK-6552 has three completed Phase 1 trials: NCT06619665, a study in sleep-deprived healthy participants with narcolepsy; NCT06662396, a study of diltiazem with a single dose of MK-6552 in healthy adults; and NCT06665230, a study of MK-6552 and modafinil in healthy men. All were conducted in the United States.

Is MK-6552 the same as modafinil?

No, MK-6552 is not the same as modafinil. MK-6552 is an investigational small molecule being developed by Merck, while modafinil is a separate drug used in a completed Phase 1 study (NCT06665230) to evaluate the effects of MK-6552 when administered together in healthy men.