HealthyPhase 1NCT07548606
A Drug-Drug Interaction Study of Itraconazole and Opevesostat (MK-5684) in Healthy Adult Male Participants (MK-5684-017)
A Phase 1 study testing Opevesostat, Prednisone and Fludrocortisone acetate in people with Healthy, run by Merck Sharp & Dohme LLC at 1 site in United States.
Trial summary
Researchers have designed a study medicine called opevesostat as a new way to treat prostate cancer. The purpose of this study is to learn what happens to opevesostat in a person's body over time (a pharmacokinetic or PK study). Read more about this study
- Who is it for?
- Ages 19 to 55 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Healthy
- What is being tested?
- Opevesostat, Prednisone and Fludrocortisone acetate
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 14 participants
- Where
- 1 siteUnited States
- Study dates
- 11 May 2026to 18 Jun 2026
- Phase
- Phase 1
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 19 to 55 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- The main inclusion criteria include but are not limited to the following:
- Has a body mass index ≥18.0 and ≤32.0 kg/m^2
- Is medically healthy with no clinically significant medical history
Who cannot join
- The main exclusion criteria include but are not limited to the following:
- Has a history or presence of any of the following: adrenal insufficiency; hepatic or renal impairment; clinically significant hypotension, cardiac arrhythmia, cardiac conduction abnormalities, or recurrent unexplained syncopal events; second- or third-degree atrioventricular heart block; clinically significant sick sinus syndrome; any systemic fungal infection; chronic infection; glaucoma; hypothyroidism; stomach ulcer; ocular herpes simplex; ventricular dysfunction or risk factors for Torsades de Pointes (e.g., heart failure, cardiomyopathy, family history of Long QT Syndrome)
- Has a history of cancer (malignancy)
Trial locations and contacts
1 site in 1 country.
United States1 site
Celerion, Inc. ( Site 0001)
Lincoln, Nebraska, 68502
About this study
Official title: A Phase 1, Open-Label, Fixed-Sequence Study to Evaluate the Effects of Multiple Doses of Itraconazole on the Single-Dose Pharmacokinetics of MK-5684 in Healthy Adult Male Participants
Researchers have designed a study medicine called opevesostat as a new way to treat prostate cancer.
The purpose of this study is to learn what happens to opevesostat in a person's body over time (a pharmacokinetic or PK study). Researchers will compare what happens to opevesostat in the body when it is given with and without another medicine called itraconazole.
- Conditions
- Healthy
- Being tested
- Opevesostat, Prednisone, Fludrocortisone acetate, Itraconazole
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
OpevesostatDrug
Also called MK-5684, ODM-208
Administered via oral film-coated tablet
PrednisoneDrug
Administered via oral tablet
Fludrocortisone acetateDrug
Administered via oral tablet
ItraconazoleDrug
Administered via oral capsule
| Study group | Role | What they receive |
|---|---|---|
| Opevesostat Period 1 | Experimental | On Day 1, a single dose of opevesostat will be administered under fed conditions. A single dose of steroid replacement (prednisone and fludrocortisone) will be administered under fed conditions approximately 4.5 hours after opevesostat dosing. Receives: Drug: Opevesostat; Drug: Prednisone; Drug: Fludrocortisone acetate |
| Opevesostat Period 2 | Experimental | There will be a washout of at least 5 days between opevesostat dosing in Period 1 and the first itraconazole dosing in Period 2. In Period 2, itraconazole will be administered once daily (QD) for 9 consecutive days with a single dose of opevesostat coadministered on Day 4 under fed conditions. Steroid replacement (prednisone and fludrocortisone) will be administered under fed conditions QD on Days 4 through 6, approximately 4.5 hours after opevesostat and/or itraconazole dosing. Receives: Drug: Opevesostat; Drug: Prednisone; Drug: Fludrocortisone acetate; Drug: Itraconazole |
What is being measured
The primary outcome is the main question the study is designed to answer.
Area under the concentration versus time curve from 0 to infinity after single dosing (AUC0-inf) of opevesostat
Blood samples will be collected to determine the AUC0-inf of opevesostat.
Measured: Predose, and at designated timepoints up to 144 hours post-dose
Area under the concentration versus time curve from 0 to last quantifiable sample (AUC0-last) of opevesostat
Blood samples will be collected to determine the AUC0-last of opevesostat.
Measured: Predose, and at designated timepoints up to 144 hours post-dose
Maximum concentration (Cmax) of opevesostat
Blood samples will be collected to determine the Cmax of opevesostat.
Measured: Predose, and at designated timepoints up to 144 hours post-dose
Time to Maximum concentration (Tmax) of opevesostat
Blood samples will be collected to determine the Tmax of opevesostat.
Measured: Predose, and at designated timepoints up to 144 hours post-dose
Apparent terminal half-life (t1/2) of opevesostat
Blood samples will be collected to determine the t1/2 of opevesostat.
Measured: Predose, and at designated timepoints up to 144 hours post-dose
Apparent Clearance (CL/F) of opevesostat
Blood samples will be collected to determine the CL/F of opevesostat.
Measured: Predose, and at designated timepoints up to 144 hours post-dose
Apparent volume of distribution during terminal phase (Vz/F) of opevesostat
Blood samples will be collected to determine the Vz/F of opevesostat.
Measured: Predose, and at designated timepoints up to 144 hours post-dose
Secondary outcomes (2)
Number of participants who experience one or more adverse events (AEs)
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 an AE will be reported.
Measured: Up to approximately 28 days
Number of participants who discontinue study intervention due to an AE
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 intervention due to an AE will be reported.
Measured: Up to approximately 28 days
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Apr 2026
- Study start11 May 2026
- Primary completion1 Jun 2026
- Study completion18 Jun 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for HealthyStudies of the same condition, open and under way.
- More trials run by Merck Sharp & Dohme LLCThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Basic science
- Allocation
- Non-randomised
- Intervention model
- Sequential
- Masking
- None (open label)
- Enrolment
- 14 participants (actual)
Sponsor and investigators
- Lead sponsor
- Merck Sharp & Dohme LLC
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- Medical Director, Study director, Merck Sharp & Dohme LLC
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07548606
- Sponsor's protocol ID
- 5684-017
- Other IDs
- MK-5684-017
- Status last verified
- Jun 2026
- First submitted
- 17 Apr 2026
- Last updated
- 25 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: https://trialstransparency.msdclinicaltrials.com/pdf/ProcedureAccessClinicalTrialData.pdf
Study at a glance
From the registry record, last updated by the sponsor on 25 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 1, Open-Label, Fixed-Sequence Study to Evaluate the Effects of Multiple Doses of Itraconazole on the Single-Dose Pharmacokinetics of MK-5684 in Healthy Adult Male Participants
- ClinicalTrials.gov ID
- NCT07548606
- Acronym / sponsor ID
- 5684-017
- Conditions
- Healthy
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 14 participants (actual)
- Lead sponsor
- Merck Sharp & Dohme LLCIndustry (pharma, biotech, devices)
- Study start
- 11 May 2026 (actual)
- Primary completion
- 1 Jun 2026 (actual)
- Study completion
- 18 Jun 2026 (actual)
- First posted
- 23 Apr 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Researchers have designed a study medicine called opevesostat as a new way to treat prostate cancer.
The purpose of this study is to learn what happens to opevesostat in a person's body over time (a pharmacokinetic or PK study). Researchers will compare what happens to opevesostat in the body when it is given with and without another medicine called itraconazole.
Study design
- Primary purpose
- Basic science
- Allocation
- Non-randomised
- Intervention model
- Sequential
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Opevesostat Period 1 | Experimental | Drug: Opevesostat, Drug: Prednisone, Drug: Fludrocortisone acetateOn Day 1, a single dose of opevesostat will be administered under fed conditions. A single dose of steroid replacement (prednisone and fludrocortisone) will be administered under fed conditions approximately 4.5 hours after opevesostat dosing. |
| Opevesostat Period 2 | Experimental | Drug: Opevesostat, Drug: Prednisone, Drug: Fludrocortisone acetate, Drug: ItraconazoleThere will be a washout of at least 5 days between opevesostat dosing in Period 1 and the first itraconazole dosing in Period 2. In Period 2, itraconazole will be administered once daily (QD) for 9 consecutive days with a single dose of opevesostat coadministered on Day 4 under fed conditions. Steroid replacement (prednisone and fludrocortisone) will be administered under fed conditions QD on Days 4 through 6, approximately 4.5 hours after opevesostat and/or itraconazole dosing. |
Who may qualify
- Ages
- 19 to 55 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (3 listed)
- Has a body mass index ≥18.0 and ≤32.0 kg/m^2
- Is medically healthy with no clinically significant medical history
Key exclusion criteria (3 listed)
- Has a history or presence of any of the following: adrenal insufficiency; hepatic or renal impairment; clinically significant hypotension, cardiac arrhythmia, cardiac conduction abnormalities, or recurrent unexplained syncopal events; second- or third-degree atrioventricular heart block; clinically significant sick sinus syndrome; any systemic fungal infection; chronic infection; glaucoma; hypothyroidism; stomach ulcer; ocular herpes simplex; ventricular dysfunction or risk factors for Torsades de Pointes (e.g., heart failure, cardiomyopathy, family history of Long QT Syndrome)
- Has a history of cancer (malignancy)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| OpevesostatAlso: MK-5684, ODM-208Administered via oral film-coated tablet | Drug | Opevesostat Period 1, Opevesostat Period 2 |
| PrednisoneAdministered via oral tablet | Drug | Opevesostat Period 1, Opevesostat Period 2 |
| Fludrocortisone acetateAdministered via oral tablet | Drug | Opevesostat Period 1, Opevesostat Period 2 |
| ItraconazoleAdministered via oral capsule | Drug | Opevesostat Period 2 |
Primary outcome
Area under the concentration versus time curve from 0 to infinity after single dosing (AUC0-inf) of opevesostat
Time frame: Predose, and at designated timepoints up to 144 hours post-dose
Blood samples will be collected to determine the AUC0-inf of opevesostat.
Area under the concentration versus time curve from 0 to last quantifiable sample (AUC0-last) of opevesostat
Time frame: Predose, and at designated timepoints up to 144 hours post-dose
Blood samples will be collected to determine the AUC0-last of opevesostat.
Maximum concentration (Cmax) of opevesostat
Time frame: Predose, and at designated timepoints up to 144 hours post-dose
Blood samples will be collected to determine the Cmax of opevesostat.
Time to Maximum concentration (Tmax) of opevesostat
Time frame: Predose, and at designated timepoints up to 144 hours post-dose
Blood samples will be collected to determine the Tmax of opevesostat.
Apparent terminal half-life (t1/2) of opevesostat
Time frame: Predose, and at designated timepoints up to 144 hours post-dose
Blood samples will be collected to determine the t1/2 of opevesostat.
Apparent Clearance (CL/F) of opevesostat
Time frame: Predose, and at designated timepoints up to 144 hours post-dose
Blood samples will be collected to determine the CL/F of opevesostat.
Apparent volume of distribution during terminal phase (Vz/F) of opevesostat
Time frame: Predose, and at designated timepoints up to 144 hours post-dose
Blood samples will be collected to determine the Vz/F of opevesostat.
2 secondary outcomes
Number of participants who experience one or more adverse events (AEs)
Time frame: Up to approximately 28 days
Number of participants who discontinue study intervention due to an AE
Time frame: Up to approximately 28 days
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 25 Jun 2026.
- Merck Clinical Trials InformationLink provided by the sponsor.
- Individual participant dataSharing planned: Yes. https://trialstransparency.msdclinicaltrials.com/pdf/ProcedureAccessClinicalTrialData.pdf
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Medical Director study director
Merck Sharp & Dohme LLC
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Opevesostat, Prednisone and Fludrocortisone acetate in people with Healthy, run by Merck Sharp & Dohme LLC at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 25 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Area under the concentration versus time curve from 0 to infinity after single dosing (AUC0-inf) of opevesostat (time frame: Predose, and at designated timepoints up to 144 hours post-dose). The study lists 7 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 25 Jun 2026.