Effects of Itraconazole and Rifampin on the Blood Tazemetostat Levels

February 18, 2025 updated by: Epizyme, Inc.

A Phase I, Open-label Multi-dose Two-part Study to Characterize the Effects of a Strong CYP3A4 Inhibitor and a Strong CYP3A4 Inducer on the Steady-State Pharmacokinetics of Tazemetostat (EPZ-6438) in Subjects With Advanced Malignancies

The participants of this study will have advanced malignancies (also known as advanced cancer). The main aim of this trial will be to study the blood levels (known as pharmacokinetics) of the tazemtostat (the study drug) when administered in combination with another drug.

Part 1 of the study will evaluate the interaction between the drugs tazemetostat and itraconazole.

Part 2 of the study will evaluate the interaction between the drugs tazemetostat and rifampin

For both Parts 1 and 2, safety and the level that effects of the study drug can be tolerated (known as tolerability) will be assessed throughout.

Study Overview

Detailed Description

This two-part study is designed to characterize the steady-state PK of oral tazemetostat and its metabolite EPZ 6930 when administered as a single and twice daily dose in subjects with advanced malignancies while taken alone or in combination with either itraconazole or rifampin.

Part 1: tazemetostat and Itraconazole Drug Interaction Part 1 of the study will evaluate the drug-drug interaction between tazemetostat and itraconazole in an open-label, fixed sequential cross over design.

Part 2: tazemetostat and Rifampin Drug Interaction Part 2 of the study will evaluate the drug-drug interaction between tazemetostat and rifampin in an open-label, fixed sequential cross over design.

For both Parts 1 and 2, safety and tolerability will be assessed throughout the subject's participation. Subjects must have an end of study visit after 30 days of the last dose of tazemetostat for safety assessment.

Study Type

Interventional

Enrollment (Actual)

42

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Barcelona, Spain, 08035
        • Hospital Universitario Vall d'Hebron
      • Madrid, Spain, 28040
        • Hospital Fundación Jiménez Díaz
    • Gipuzkoa
      • Donostia, Gipuzkoa, Spain, 20014
        • Onkologikoa
    • California
      • Encinitas, California, United States, 92024
        • California Cancer Associates for Research and Excellence, Inc. (cCARE)
      • Los Angeles, California, United States, 90025
        • The Angeles Clinic and Research Institute
    • Illinois
      • Chicago, Illinois, United States, 60611
        • Northwestern University-Robert H. Lurie Comprehensive Cancer Center
    • Michigan
      • Grand Rapids, Michigan, United States, 49546
        • South Texas Accelerated Research Therapeutics (START) Midwest
    • Ohio
      • Canton, Ohio, United States, 44718
        • Gabrail Cancer Center
      • Cincinnati, Ohio, United States, 45267
        • University of Cincinnati Medical Center
    • Texas
      • Dallas, Texas, United States, 75230
        • Mary Crowley Cancer Research

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

INCLUSION CRITERIA:

  1. Male or female ≥ 18 years age at the time of consent.
  2. Eastern Cooperative Oncology Group (ECOG) performance status 0 to 2.
  3. Has the ability to understand informed consent, and provide signed written informed consent.
  4. Life expectancy of > 3 months.
  5. Histologically and/or cytologically confirmed advanced metastatic or unresectable solid tumors has progressed after treatment for which there are no standard therapies available OR histologically and/or cytologically confirmed hematologic malignancies that have relapsed, or refractory disease, following at least 2 standard lines of systemic therapy for which there are no standard therapies available.

    Note: Subjects with prior radiotherapy will be included; however, radiotherapy alone will not be considered a separate systemic treatment regimen.

  6. Must have evaluable or measurable disease.
  7. Has all prior treatment (ie, chemotherapy, immunotherapy, radiotherapy) related clinically significant toxicities resolve to ≤ Grade 1 per National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), Version 5.0 or are clinically stable and not clinically significant, at time of consent.
  8. All subjects must have completed any prior chemotherapy, targeted therapy and major surgery ≥ 28 days before study entry. For daily or weekly chemotherapy without the potential for delayed toxicity, a washout period of 14 days or 5 half-lives, whichever is shorter may be acceptable.
  9. Has normal hepatic function (per NCI-ODWG criteria) as well as adequate hematologic (bone marrow [BM] and coagulation factors) and renal function.
  10. Able to swallow and retain orally-administered medication and without clinically significant gastrointestinal abnormalities that could alter absorption such as malabsorption syndrome or major resection of the stomach or bowels.
  11. Females of childbearing potential (FCBP) must have a negative serum pregnancy test and must either practice complete abstinence or agree to use a highly effective method of contraception.
  12. Male subjects must have had a successful vasectomy OR must either practice complete abstinence or agree to use a latex or synthetic condom during sexual contact with a female of childbearing potential (FCBP) during study treatment (including during dose interruptions), and for 3 months after study drug discontinuation.

    NOTE: Male subjects must not donate sperm during study treatment (including during dose interruptions), and for 3 months after study drug discontinuation.

  13. Has a QT interval corrected by Fridericia's formula (QTcF) ≤450 msec.

EXCLUSION CRITERIA:

  1. Symptomatic or untreated leptomeningeal or brain metastases or spinal cord compression or primary glioblastoma multiforme.
  2. Clinically significant bleeding diathesis or coagulopathy.
  3. Known hypersensitivity to any of the components of Tazemetostat, itraconazole, or rifampin.
  4. Use of concurrent investigational agent or anticancer therapy.
  5. Uncontrolled concurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, clinically significant cardiac arrhythmias, or psychiatric illness/social situations that would limit compliance with study requirements.
  6. Have a known active infection with hepatitis B virus (HBV), hepatitis C virus (HCV), AND/OR human T-cell lymphotropic virus 1.
  7. Subjects taking medications that are known CYP3A4 inducers or inhibitors (including St. John's Wort).
  8. Is unwilling to exclude grapefruit juice, Seville oranges and grapefruit from the diet and all foods that contain those fruits from 24 hours prior to the first dose of study drug until the last dose of study drug.
  9. Any condition or medical problem in addition to the underlying malignancy and organ dysfunction that the Investigator feels would pose unacceptable risk.
  10. Has a prior history of myeloid malignancies, including myelodysplastic syndrome (MDS)/acute myeloid leukemia (AML) or myeloproliferative neoplasm (MPN) or T-cell lymphoblastic lymphoma (T-LBL)/ T-cell acute lymphoblastic leukemia (T-ALL).
  11. Ingestion of alcohol within 72 hours prior to day 1 of Cycle 1 until the end of Cycle 1 (Day 39 for Part 1 and Day 26 for Part 2). Regular alcohol consumption must not exceed 16 units for males and 7 units for females per week (2 units equals 40mL [a can] of beer, 175mL [a standard glass] of wine, or 50 mL [2 small shots] of spirits
  12. Any form of marijuana use.
  13. History of drug abuse (including alcohol) within the last 6 months prior to screening.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Part 1: Tazemetostat and Itraconazole Drug Interaction Cycle 1

Participants in Part 1 of the study will receive a single oral, 400 mg dose of tazemetostat on Day 1, 15, and Day 36.

The study participants will receive tazemetostat (oral 400 mg) tablets to be taken twice daily on Days 3 - 14 and Days 21 - 35. In addition, the participants will receive oral 200 mg itraconazole once daily on Days 18 - 38.

Study participants may continue tazemetostat from Day 40+ at the recommended therapeutic dose (oral 800 mg twice daily) in 28-day cycles.

A single, oral, 400 mg dose of tazemetostat on Day 1, Day 15, and Day 36; and tazemetostat (oral 400 mg) tablets twice daily on Days 3 - 14 and Days 21 - 35.
Other Names:
  • EPZ-6438
  • Tazverik
Oral 200 mg itraconazole once daily on Days 18 - 38
Other Names:
  • Sporanox
A single, oral, 800 mg dose of tazemetostat on Days 1, 15, and Day 24 ; and tazemetostat (oral 800 mg) twice daily on Days 3 - 14 and on Days 17 - 23.
Other Names:
  • EPZ-6438
  • Tazverik
Experimental: Part 2:Tazemetostat and Rifampin Drug Interaction Cycle 1

Participants in Part 2 of the study will receive a single oral, 800 mg dose of tazemetostat on Days 1, 15, and Day 36.

The study participants will receive tazemetostat (oral 800 mg dose) tablets to be taken twice daily on Days 3 - 14 and Days 17 - 23. In addition, the participants will receive oral 200 mg rifampin once daily on Days 17 - 25.

Study participants may continue tazemetostat from Day 27+ at the recommended therapeutic dose (oral 800 mg twice daily) in 28-day cycles.

A single, oral, 400 mg dose of tazemetostat on Day 1, Day 15, and Day 36; and tazemetostat (oral 400 mg) tablets twice daily on Days 3 - 14 and Days 21 - 35.
Other Names:
  • EPZ-6438
  • Tazverik
A single, oral, 800 mg dose of tazemetostat on Days 1, 15, and Day 24 ; and tazemetostat (oral 800 mg) twice daily on Days 3 - 14 and on Days 17 - 23.
Other Names:
  • EPZ-6438
  • Tazverik
Oral 600 mg rifampin once daily on Days 17 - 25.
Other Names:
  • Rifampicin
  • Rimactane
  • Rifadin
  • RIF

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Part 1: Area Under the Plasma Concentration-Time Curve From Time 0 to 12 Hours of Quantifiable Concentration (AUC0-12h) of Tazemetostat
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Blood samples were collected at specified timepoints. AUC0-12h was assessed using non-compartmental data analysis method. AUC0-12h was estimated by a combination of linear trapezoidal method on concentrations going up and logarithmic trapezoidal method on concentrations going down (Linear up/Log down method).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Part 1: Maximum Observed Plasma Concentration (Cmax) of Tazemetostat
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, 48, and 72 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Blood samples were collected at specified timepoints. Cmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, 48, and 72 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Part 2: AUC0-12h of Tazemetostat
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Blood samples were collected at specified timepoints. AUC0-12h was assessed using non-compartmental data analysis method. AUC0-12h was estimated by a combination of linear trapezoidal method on concentrations going up and logarithmic trapezoidal method on concentrations going down (Linear up/Log down method).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Part 2: Cmax of Tazemetostat
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Blood samples were collected at specified timepoints. Cmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Part 1: AUC0-12h of EPZ-6930 After Tazemetostat Alone at Steady-State
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 15
Blood samples were collected at specified timepoints. AUC0-12h was assessed using non-compartmental data analysis method. AUC0-12h was estimated by a combination of linear trapezoidal method on concentrations going up and logarithmic trapezoidal method on concentrations going down (Linear up/Log down method).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 15
Part 1: AUC0-12h of Tazemetostat and EPZ-6930 After Tazemetostat at Steady-State With Itraconazole
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 36
Blood samples were collected at specified timepoints. AUC0-12h was assessed using non-compartmental data analysis method. AUC0-12h was estimated by a combination of linear trapezoidal method on concentrations going up and logarithmic trapezoidal method on concentrations going down (Linear up/Log down method).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 36
Part 1: Cmax of EPZ-6930 After Tazemetostat Alone at Steady-State
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 15
Blood samples were collected at specified timepoints. Cmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 15
Part 1: Cmax of Tazemetostat and EPZ-6930 After Tazemetostat at Steady State With Itraconazole
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 36
Blood samples were collected at specified timepoints. Cmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 36
Part 1: Observed Time at Cmax (Tmax) of Tazemetostat and EPZ-6930 After Tazemetostat Alone at Steady-State
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 15
Blood samples were collected at specified timepoints. Tmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 15
Part 1: Tmax of Tazemetostat and EPZ-6930 After Tazemetostat at Steady-State With Itraconazole
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 36
Blood samples were collected at specified timepoints. Tmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 36
Part 1: Apparent Terminal Elimination Half-Life (t1/2) of Tazemetostat and EPZ-6930 After Tazemetostat Alone at Steady-State
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 15
Blood samples were collected at specified timepoints. T1/2 was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 15
Part 1: T1/2 of Tazemetostat and EPZ-6930 After Tazemetostat at Steady-State With Itraconazole
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 36
Blood samples were collected at specified timepoints. T1/2 was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 36
Part 2: AUC0-12h of EPZ-6930 After Tazemetostat Alone at Steady-State
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 15
Blood samples were collected at specified timepoints. AUC0-12h was assessed using non-compartmental data analysis method. AUC0-12h was estimated by a combination of linear trapezoidal method on concentrations going up and logarithmic trapezoidal method on concentrations going down (Linear up/Log down method).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 15
Part 2: AUC0-12h of Tazemetostat and EPZ-6930 After Tazemetostat at Steady-State With Rifampin
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12 hours post-dose on Cycle 1 Day 24
Blood samples were collected at specified timepoints. AUC0-12h was assessed using non-compartmental data analysis method. AUC0-12h was estimated by a combination of linear trapezoidal method on concentrations going up and logarithmic trapezoidal method on concentrations going down (Linear up/Log down method).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12 hours post-dose on Cycle 1 Day 24
Part 2: Cmax of EPZ-6930 After Tazemetostat Alone at Steady-State
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 15
Blood samples were collected at specified timepoints. Cmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 15
Part 2: Cmax of Tazemetostat and EPZ-6930 After Tazemetostat at Steady State With Rifampin
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, and 48 hours post-dose on Cycle 1 Day 24
Blood samples were collected at specified timepoints. Cmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, and 48 hours post-dose on Cycle 1 Day 24
Part 2: Tmax of Tazemetostat and EPZ-6930 After Tazemetostat Alone at Steady-State
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 15
Blood samples were collected at specified timepoints. Tmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 15
Part 2: Tmax of Tazemetostat and EPZ-6930 After Tazemetostat at Steady-State With Rifampin
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, and 48 hours post-dose on Cycle 1 Day 24
Blood samples were collected at specified timepoints. Tmax was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, and 48 hours post-dose on Cycle 1 Day 24
Part 2: T1/2 of Tazemetostat and EPZ-6930 EPZ-6930 After Tazemetostat Alone at Steady-State
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 15
Blood samples were collected at specified timepoints. T1/2 was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 15
Part 2: T1/2 of Tazemetostat and EPZ-6930 After Tazemetostat at Steady-State With Rifampin
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, and 48 hours post-dose on Cycle 1 Day 24
Blood samples were collected at specified timepoints. T1/2 was assessed using non-compartmental data analysis method.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, and 48 hours post-dose on Cycle 1 Day 24

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Part 1: Least Squares Geometric Mean Ratio of Observed Accumulation Ratio of AUC0-12h for Tazemetostat
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Blood samples were collected at specified timepoints. AUC0-12h accumulation ratio was assessed using non-compartmental data analysis method. AUC0-12h accumulation ratio was calculated as the ratio of AUC0-12h at steady state (Cycle 1 Day 15) divided by AUC0-12 during the initial dosing interval (Cycle 1 Day 1).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Part 1: Least Squares Geometric Mean Ratio of Cmax Accumulation Ratio for Tazemetostat
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8,12, 36, 48 post-dose on Cycle 1 Day 1, and 72 hours post-dose on Cycle 1 Day 15
Blood samples were collected at specified timepoints. Cmax accumulation ratio was assessed using non-compartmental data analysis method. Cmax accumulation ratio was calculated as the ratio of Cmax at steady state (Cycle 1 Day 15) divided by Cmax during the initial dosing interval (Cycle 1 Day 1).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8,12, 36, 48 post-dose on Cycle 1 Day 1, and 72 hours post-dose on Cycle 1 Day 15
Part 1: Least Squares Geometric Mean Ratio of AUC0-12h After Single Dose of Tazemetostat With Itraconazole
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 1 (without itraconazole) and Cycle 1 Day 21 (with itraconazole)
Blood samples were collected at specified timepoints. Drug-drug interaction was assessed using analysis of variance (ANOVA).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 1 (without itraconazole) and Cycle 1 Day 21 (with itraconazole)
Part 1: Least Squares Geometric Mean Ratio of Cmax After Single Dose of Tazemetostat With Itraconazole
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 1 (without itraconazole) and Cycle 1 Day 21 (with itraconazole)
Blood samples were collected at specified timepoints. Drug-drug interaction was assessed using ANOVA.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 1 (without itraconazole) and Cycle 1 Day 21 (with itraconazole)
Part 1: Least Squares Geometric Mean Ratio of AUC0-12h After Tazemetostat at Steady-State With Itraconazole
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 15 (without itraconazole) and Cycle 1 Day 36 (with itraconazole)
Blood samples were collected at specified timepoints. Drug-drug interaction was assessed using ANOVA.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, and 12 hours post-dose on Cycle 1 Day 15 (without itraconazole) and Cycle 1 Day 36 (with itraconazole)
Part 1: Least Squares Geometric Mean Ratio of Cmax After Tazemetostat at Steady-State With Itraconazole
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 15 (without itraconazole) and Cycle 1 Day 36 (with itraconazole)
Blood samples were collected at specified timepoints. Drug-drug interaction was assessed using ANOVA.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 36, and 72 hours post-dose on Cycle 1 Day 15 (without itraconazole) and Cycle 1 Day 36 (with itraconazole)
Part 2: Least Squares Geometric Mean Ratio of Observed Accumulation Ratio of AUC0-12h for Tazemetostat
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8,12, 24, 36, and 48 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Blood samples were collected at specified timepoints. AUC0-12h accumulation ratio was assessed using non-compartmental data analysis method. AUC0-12h accumulation ratio was calculated as the ratio of AUC0-12h at steady state (Cycle 1 Day 15) divided by AUC0-12h during the initial dosing interval (Cycle 1 Day 1).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8,12, 24, 36, and 48 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Part 2: Least Squares Geometric Mean Ratio of Cmax Accumulation Ratio for Tazemetostat
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8,12, 24, 36, and 48 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Blood samples were collected at specified timepoints. Cmax accumulation ratio was assessed using non-compartmental data analysis method. Cmax accumulation ratio was calculated as the ratio of Cmax at steady state (Cycle 1 Day 15) divided by Cmax during the initial dosing interval (Cycle 1 Day 1).
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8,12, 24, 36, and 48 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
Part 2: Least Squares Geometric Mean Ratio of AUC0-12h After Tazemetostat at Steady State With Rifampin
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12 hours post-dose on Cycle 1 Day 15 (without rifampin) and Cycle 1 Day 24 (with rifampin)
Blood samples were collected at specified timepoints. Drug-drug interaction was assessed using ANOVA.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12 hours post-dose on Cycle 1 Day 15 (without rifampin) and Cycle 1 Day 24 (with rifampin)
Part 2: Least Squares Geometric Mean Ratio of Cmax After Tazemetostat at Steady State With Rifampin
Time Frame: Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 15 (without rifampin) and Cycle 1 Day 24 (with rifampin)
Blood samples were collected at specified timepoints. Drug-drug interaction was assessed using ANOVA.
Pre-dose (0 hour), 0.5, 1, 1.5, 2, 4, 6, 8, 12, 24, 36, and 48 hours post-dose on Cycle 1 Day 15 (without rifampin) and Cycle 1 Day 24 (with rifampin)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Investigators

  • Study Director: Ipse Medical Director, Ipsen

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 23, 2020

Primary Completion (Actual)

April 3, 2023

Study Completion (Actual)

April 3, 2023

Study Registration Dates

First Submitted

July 29, 2020

First Submitted That Met QC Criteria

August 31, 2020

First Posted (Actual)

September 3, 2020

Study Record Updates

Last Update Posted (Actual)

March 25, 2025

Last Update Submitted That Met QC Criteria

February 18, 2025

Last Verified

February 1, 2025

More Information

Terms related to this study

Other Study ID Numbers

  • EZH-108
  • 2020-002669-33 (EudraCT Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Solid Tumor

Clinical Trials on Tazemetostat

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