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CompletedNCT03259542Updated Feb 22, 2018

Mifepristone Drug-Drug Interaction Study With CYP3A Inhibitor

A Phase 1 interventional study of Mifepristone 300 MG and Itraconazole 100 MG in Drug Interaction Potentiation and Healthy, sponsored by Corcept Therapeutics. Completed at 1 site in United States. Open to male participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-02-22.

Sponsored by Corcept Therapeutics · Phase 1, Interventional, and Other

From the registry’s dates

  • Primary completion was Dec 2017, 8 years 11 months ago, and no results have been posted to the registry.

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Phase
Phase 1
Study type
Interventional
Enrollment
33
Allocation
Not applicable
Ages
18 Years to 65 Years
Sex
Male
01

Study summary

This is a Phase 1, single-center, fixed-sequence, open label, drug-drug interaction study of the effect of multiple daily doses of oral itraconazole 200 mg, a strong inhibitor of CYP3A, given with mifepristone 900 mg QD, in healthy male subjects, where all drug administrations are given after a meal.

02

Conditions studied

  • Drug Interaction Potentiation
  • Healthy
03

In context

Lead sponsor

Corcept Therapeutics is the lead sponsor of 73 studies on the registry; 3 are open to participants now.

Of its 32 completed or terminated interventional studies of FDA-regulated products, 9 (28%) have results posted.

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

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
Male
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Be healthy
  • Have a of 18 to 32 kg/m2, inclusive and body weight more than 50 kg (110 pounds)
  • Be judged to be in good health, based on the results of medical history, physical examination, vital signs, 12-lead , and clinical laboratory findings
  • Have suitable veins for multiple venipuncture/cannulation

Exclusion criteria

Exclusion Criteria:

  • Have multiple drug allergies, or be allergic to any of the components of mifepristone or itraconazole
  • Have a condition that could be aggravated by blockade (eg, asthma, any chronic inflammatory condition)
  • In the 1 year before study drug administration, have a history of drug or alcohol abuse
  • In the 6 calendar months before study drug administration, on average

    • Have smoked more than 5 cigarettes/day
    • Have consumed more than 21 units of alcohol/week (1 unit/drink = 5 ounces of wine, or 12 ounces of beer, or 1.5 ounces of hard liquor)
  • In 2 months prior to study drug administration, have donated/lost blood or plasma in excess of 400 mL
  • In the 30 days before study drug administration, have participated in another clinical trial of a new chemical entity or a prescription medicine
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

ECG (electrocardiogram)

A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

05

Study design

Phase
Phase 1
Primary purpose
Other
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
33 participants (actual)

Study arms

  • Experimental
    Arm 1

    Mifepristone 300 MG alone or Mifepristone 300 MG with Itraconazole 100 MG will be administered.

    Drug: Mifepristone 300 MG · Drug: Itraconazole 100 MG

Interventions

  • mifepristone 300 MG (4 tablets) orally for a total of 1200 mg a day for 14 days; then mifepristone 300 mg (3 tablets) orally for a total of 900 mg a day for 28 days

  • itraconazole 100 MG (2 capsules) orally for a total of 200 MG for the last 14 days of mifepristone dosing

06

What researchers measure

Primary outcomes

  1. Cmax of mifepristone at Day 42 compared to Day 28

    Maximum (peak) plasma drug concentration (Cmax)

    Time frame: Day 42 compared to Day 28

  2. AUC0-24 of mifepristone at Day 42 compared to Day 28

    Area under the plasma concentration-time curve from zero to 24 hours (AUC0-24)

    Time frame: Day 42 compared to Day 28

Secondary outcomes

  1. Cmax of mifepristone at Day 42 compared to Day 14

    Time frame: Day 42 compared to Day 14

  2. AUC0-24 of mifepristone compared to Day 14

    Time frame: Day 42 compared to Day 14

  3. T1/2 of mifepristone

    Elimination half-life (T1/2)

    Time frame: Days 14 and 28

  4. Ctrough of mifepristone

    Trough plasma concentration (measured concentration at the end of a dosing interval at steady state \[taken directly before next administration\]) (Ctrough)

    Time frame: Days 1 through 28

07

Study locations

1 site
  • SeaView Research
    Miami, Florida 33126, United States
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Aug 2017 to primary completion in Dec 2017, 4 months.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 7, 2017
First posted
Aug 23, 2017
StartActual
Aug 9, 2017
Primary completionActual
Dec 11, 2017
CompletionActual
Dec 11, 2017
Last update
Feb 22, 2018
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 22, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT03259542
Responsible party
Sponsor
First posted
Aug 23, 2017
Start date
Aug 9, 2017
Primary completion
Dec 11, 2017
Completion
Dec 11, 2017
Last update
Feb 22, 2018

Study contacts

Ada Lee, MD
study director · Corcept Therapeutics

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 Oct 2017. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drugs tested here: Mifepristone · Itraconazole

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