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CompletedNCT06586606Updated Dec 18, 2024

A Study to Evaluate the Effects of Itraconazole on MK-1708 in Healthy Participants (MK-1708-003)

A Phase 1 interventional study of MK-1708 and Itraconazole in Alzheimer's Disease, sponsored by Merck Sharp & Dohme LLC. Completed at 1 site in United States. Open to participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-12-18.

Sponsored by Merck Sharp & Dohme LLC (part of Merck & Co., Inc) · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was Dec 2024, 1 year 9 months ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
12
Allocation
Non-randomized
Ages
18 Years to 50 Years
Sex
All
01

Study summary

The goal of the study is to see what happens to levels of MK-1708 a person's body over time. Researchers will compare what happens to MK-1708 in the body when it is given with or without a medicine called itraconazole.

02

Conditions studied

  • Alzheimer's Disease

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03

In context

Alzheimer Disease

3,681 studies on the registry are indexed under Alzheimer Disease; 875 are open to participants now.

This study's enrollment of 12 is below the median of 70 across 2,809 interventional studies indexed under Alzheimer Disease.

Browse Alzheimer Disease studies →

Lead sponsor

Merck Sharp & Dohme LLC is the lead sponsor of 2,114 studies on the registry; 132 are open to participants now.

Of its 489 completed or terminated interventional studies of FDA-regulated products, 362 (74%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

The key inclusion criteria include but are not limited to the following:

  • Is in good health before randomization
  • Has a body mass index (BMI) ≥18.5 and ≤32 kg/m\^2, inclusive

Exclusion criteria

Exclusion Criteria:

The key exclusion criteria include but are not limited to the following:

  • Has a history of clinically significant endocrine, gastrointestinal (GI), cardiovascular, hematological, hepatic, immunological, renal, respiratory, genitourinary, or major neurological (including stroke and chronic seizures) abnormalities or diseases
  • Has a history of cancer
05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
12 participants (actual)

Study arms

  • Experimental
    Period 1: MK-1708

    Participants will receive a single oral dose of MK-1708 on Day 1.

    Drug: MK-1708

  • Experimental
    Period 2: MK-1708 and Itraconazole

    A washout period of at least 10 days will occur between MK-1708 dosing in Period 1 and the first itraconazole dosing in Period 2. In Period 2, participants will receive itraconazole twice daily on Day 1 and once daily on Days 2 through Day 19. Participants will also receive a single oral dose of MK-1708 on Day 4.

    Drug: MK-1708 · Drug: Itraconazole

Interventions

  • DrugMK-1708

    Oral administration

  • DrugItraconazole

    Oral administration

06

What researchers measure

Primary outcomes

  1. Area Under the Concentration-Time Curve from Time 0 to Infinity (AUC0-Inf) of MK-1708

    Blood samples will be collected to determine the AUC0-inf of MK-1708.

    Time frame: Predose and at designated timepoints up to approximately 2 weeks postdose

  2. Number of Participants Who Experience an Adverse Event (AE)

    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 experience an AE will be reported.

    Time frame: Up to approximately 11 weeks

  3. Number of Participants Who Discontinue Study Due to an AE

    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 due to an AE will be reported.

    Time frame: Up to approximately 11 weeks

Secondary outcomes

  1. Area Under the Concentration-Time Curve from Time 0 to Last Quantifiable Concentration (AUC0-Last) of MK-1708

    Blood samples will be collected to determine the AUC0-last of MK-1708.

    Time frame: Predose and at designated timepoints up to approximately 2 weeks postdose

  2. Maximum Plasma Concentration (Cmax) of MK-1708

    Blood samples will be collected to determine the Cmax of MK-1708.

    Time frame: Predose and at designated timepoints up to approximately 2 weeks postdose

  3. Time to Maximum Plasma Concentration (Tmax) of MK-1708

    Blood samples will be collected to determine the Tmax of MK-1708.

    Time frame: Predose and at designated timepoints up to approximately 2 weeks postdose

  4. Plasma Concentration at 24 Hours (C24) of MK-1708

    Blood samples will be collected to determine the C24 of MK-1708.

    Time frame: Predose and at designated timepoints up to 24 hours postdose

  5. Apparent Clearance (CL/F) of MK-1708

    Blood samples will be collected to determine the CL/F of MK-1708.

    Time frame: Predose and at designated timepoints up to approximately 2 weeks postdose

  6. Apparent Volume of Distribution During Terminal Phase (Vz/F) of MK-1708

    Blood samples will be collected to determine the Vz/F of MK-1708.

    Time frame: Predose and at designated timepoints up to approximately 2 weeks postdose

  7. Apparent Terminal Half-life (t1/2) of MK-1708

    Blood samples will be collected to determine the t1/2 of MK-1708.

    Time frame: Predose and at designated timepoints up to approximately 2 weeks postdose

07

Study locations

1 site
  • QPS-MRA, LLC ( Site 0001)
    South Miami, Florida 33143, United States
08

References and documents

Individual participant data

Plan to share: Yes — http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 18, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06586606
Responsible party
Sponsor
First posted
Sep 19, 2024
Start date
Oct 3, 2024
Primary completion
Dec 10, 2024
Completion
Dec 10, 2024
Last update
Dec 18, 2024

Study contacts

Medical Director
study director · Merck Sharp & Dohme LLC

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Dec 2024. You cannot join it, but the record below documents what was studied.

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