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Study to Evaluate Multiple Doses of Fluconazole, a CYP3A4 and CYP2C9 Inhibitor, on the Pharmacokinetics of CTP-543 in Healthy Subjects

A Phase 1, Open-Label, Fixed-Sequence, Drug-Drug Interaction Study to Evaluate the Effect of Multiple Doses of Fluconazole, a CYP3A4 and CYP2C9 Inhibitor, on the Pharmacokinetics of CTP-543 in Healthy Subjects

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05478772
Enrollment
18
Registered
2022-07-28
Start date
2022-07-11
Completion date
2022-08-12
Last updated
2022-08-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Health Volunteers

Keywords

CTP-543

Brief summary

A single center, Phase 1, open-label, fixed-sequence, drug-drug interaction study to evaluate the effect of multiple doses of Fluconazole, a CYP3A4 and CYP2C9 inhibitor, on the pharmacokinetics (PK) of CTP-543 in healthy subjects

Interventions

12 mg on Day 1 and Day 7

DRUGFluconazole

200 mg once daily on Days 3 through to Day 8

Sponsors

Concert Pharmaceuticals
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
OTHER
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
Yes

Inclusion criteria

* Healthy, adult, male or female, aged 18-60 inclusive * Non-smoker who has not used nicotine-containing products for at least 3 months prior to the first dosing * Body mass index (BMI) ≥ 18.0 and ≤ 32.0 kg/m2 at screening * If of reproductive age, willing and able to use a medically highly effective form of birth control 4 weeks prior to first dose, during the study and for 30 days following last dose of study medication. * Understands the study procedures in the informed consent form (ICF), and be willing and able to comply with the protocol

Exclusion criteria

* History or presence of clinically significant medical or psychiatric condition or disease * History or presence of alcohol or drug abuse within the past 2 years * History or presence of hypersensitivity or idiosyncratic reaction to the study drugs or related compounds * Presence or history of significant gastrointestinal, liver or kidney disease, or any other condition that is known to interfere with drug absorption, distribution, metabolism or excretion, or known to potentiate or predispose to undesired effects * History of prolonged QT syndrome or a QTc interval with Fridericia's correction (QTcF) \> 450 msec for males or QTcF \> 470 msec for females at Screening visit or prior to the first dosing * Abnormal liver function at Screening * Females who are nursing, pregnant, or planning to become pregnant while in the study, and for 30 days after last dose of study drug * Positive results for coronavirus infection (COVID-19) at Screening or check-in * Positive drug or alcohol results at Screening or check-in * Positive results at Screening for human immunodeficiency virus (HIV), hepatitis B surface antigen (HBsAg) or hepatitis C virus (HCV) * Vaccination with a live attenuated vaccine up to 6 weeks prior to dosing. Live vaccines include (but are not limited to) the measles, mumps, and rubella (MMR) vaccine; intranasal flu vaccine; and Zostavax for herpes zoster

Design outcomes

Primary

MeasureTime frameDescription
λzPre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36 and 48 hours post-doseTerminal elimination rate constant
CmaxPre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36 and 48 hours post-doseMaximum observed concentration
TmaxPre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36 and 48 hours post-doseTime to reach maximum observed concentration
AUC0-infPre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36 and 48 hours post-doseArea under the concentration-time curve from time 0 extrapolated to infinity
t1/2Pre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36 and 48 hours post-doseApparent terminal half-life
AUC0-tlastPre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36 and 48 hours post-doseArea under the concentration-time curve from time 0 to the time of the last observed/measured non-zero concentration

Secondary

MeasureTime frameDescription
Assessment of Safety and Tolerability following administration of CTP-543Continuous from screening (within 21 days prior to Day 1) through Discharge (approximately 7 days after last study drug administration)Number of adverse events, including abnormal clinical laboratory findings, abnormal physical examinations, abnormal ECGs and abnormal vital signs tabulated for each subject

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026