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NCT04537715 · OUTCOME

Part 1: Maximum Observed Plasma Concentration (Cmax) of Tazemetostat

Effects of Itraconazole and Rifampin on the Blood Tazemetostat Levels · Source last updated 2025-02-19

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure
GEOMETRIC_MEAN
Unit
ng/mL
Interval / dispersion
Geometric Coefficient of Variation
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

What was measured

Blood samples were collected at specified timepoints. Cmax was assessed using non-compartmental data analysis method.

Analysis population: The PK population included all participants who had sufficient PK concentration data to calculate steady-state PK parameters in Part 1 and did not have any major protocol deviation that was deemed to greatly alter the steady-state exposure to tazemetostat or itraconazole.

Groups in this outcome

Part 1: Tazemetostat

Participants received a single oral dose of 400 mg tazemetostat on Cycle 1 Day 1, BID dose of tazemetostat 400 mg on Days 3 to 14 and single dose of tazemetostat 400 mg on Day 15. From Days 21 to 35, they received a 400 mg BID dose of tazemetostat. On Cycle 1 Day 36, they received a single dose of 400 mg tazemetostat. Participants continued to receive tazemetostat treatment at the recommended therapeutic dose (oral 800 mg tazemetostat BID), from Day 40 (Cycle 2 Day 1) for each subsequent cycle of 28-day duration until Investigator assessed clinical progression per standard practice, unacceptable treatment related toxicity/withdrawal; survival follow-up (until death/study closure).

Group identifiers and denominators belong to this outcome only. They may differ in another outcome or in safety reporting.

Analysis denominator · Participants

GroupSource count
Part 1: Tazemetostat16

Reported measurements

Cycle 1 Day 1
Values in ng/mL · Interval/dispersion: Geometric Coefficient of Variation
GroupValueSpreadLowerUpperComment
Part 1: Tazemetostat70456.5Not reportedNot reportedNot reported
Cycle 1 Day 15
Values in ng/mL · Interval/dispersion: Geometric Coefficient of Variation
GroupValueSpreadLowerUpperComment
Part 1: Tazemetostat54363.3Not reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        spread
        56.5
        value
        704
    title
    Cycle 1 Day 1
  2. categories
    1. measurements
      1. group Id
        OG000
        spread
        63.3
        value
        543
    title
    Cycle 1 Day 15
denoms
  1. counts
    1. group Id
      OG000
      value
      16
    units
    Participants
description
Blood samples were collected at specified timepoints. Cmax was assessed using non-compartmental data analysis method.
dispersion Type
Geometric Coefficient of Variation
groups
  1. description
    Participants received a single oral dose of 400 mg tazemetostat on Cycle 1 Day 1, BID dose of tazemetostat 400 mg on Days 3 to 14 and single dose of tazemetostat 400 mg on Day 15. From Days 21 to 35, they received a 400 mg BID dose of tazemetostat. On Cycle 1 Day 36, they received a single dose of 400 mg tazemetostat. Participants continued to receive tazemetostat treatment at the recommended therapeutic dose (oral 800 mg tazemetostat BID), from Day 40 (Cycle 2 Day 1) for each subsequent cycle of 28-day duration until Investigator assessed clinical progression per standard practice, unacceptable treatment related toxicity/withdrawal; survival follow-up (until death/study closure).
    id
    OG000
    title
    Part 1: Tazemetostat
param Type
GEOMETRIC_MEAN
population Description
The PK population included all participants who had sufficient PK concentration data to calculate steady-state PK parameters in Part 1 and did not have any major protocol deviation that was deemed to greatly alter the steady-state exposure to tazemetostat or itraconazole.
reporting Status
POSTED
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
title
Part 1: Maximum Observed Plasma Concentration (Cmax) of Tazemetostat
type
PRIMARY
unit Of Measure
ng/mL

Download exact source JSON → · Snapshot ctgov-results-25a395029948b04d52b1253f

Preserved source evidence · Not medical advice