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NCT04537715 · OUTCOME

Part 1: Least Squares Geometric Mean Ratio of Observed Accumulation Ratio of AUC0-12h for 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_LEAST_SQUARES_MEAN
Unit
ratio
Interval / dispersion
90% Confidence Interval
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

What was measured

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).

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

Source class 1
Values in ratio · Interval/dispersion: 90% Confidence Interval
GroupValueSpreadLowerUpperComment
Part 1: Tazemetostat0.842Not reported0.7260.976Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        0.726
        upper Limit
        0.976
        value
        0.842
denoms
  1. counts
    1. group Id
      OG000
      value
      16
    units
    Participants
description
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).
dispersion Type
90% Confidence Interval
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_LEAST_SQUARES_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 hours post-dose on Cycle 1 Day 1 and Cycle 1 Day 15
title
Part 1: Least Squares Geometric Mean Ratio of Observed Accumulation Ratio of AUC0-12h for Tazemetostat
type
OTHER_PRE_SPECIFIED
unit Of Measure
ratio

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Preserved source evidence · Not medical advice