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PharmacoKINEtics of TAMoxifen and Its Metabolites in Breast Cancer Patients: the Influence of a Dose Increase in Phenotypic Poor Metabolizers of CYP2D6 (KINETAM)

NCT01192308 · Status: COMPLETED · Phase: PHASE1 · Type: INTERVENTIONAL · Enrollment: 42

Last updated 2020-12-01

No results posted yet for this study

Summary

All women on tamoxifen receive the standard dose of 20mg QD, irrespective of the use of potential CYP2D6 inhibitors, and are not tested for CYP2D6 polymorphisms prior to start of tamoxifen treatment.However CYP2D6 polymorphisms and/or the use of CYP2D6 inhibitors as co-medication may influence the treatment outcome of tamoxifen.

The investigators propose a prospective study in women taking tamoxifen at a dose of 20mg QD. In each woman, information will be collected on endoxifen levels, CYP2D6 status, adherence and use of co-medication. In women who are phenotypically poor metabolizers of tamoxifen, a dose increase to 40mg QD will be applied and the effect of this intervention on tamoxifen pharmacokinetics will be evaluated after 4 weeks.

Conditions

Interventions

DRUG

Tamoxifen 40mg QD

Tamoxifen 40mg QD during 4 weeks

Sponsors & Collaborators

  • Radboud University Medical Center

    lead OTHER

Principal Investigators

  • David M Burger, PharmD, PhD · Radboud University Medical Center

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
FEMALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2010-07-31
Primary Completion
2011-05-31
Completion
2012-05-31

Countries

  • Netherlands

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01192308 on ClinicalTrials.gov