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Clinical trialNCT03317405Active, not recruitingPhase 1Interventional

Phase I Trial of Endoxifen Gel Versus Placebo in Women Undergoing Breast Surgery

SponsorNational Cancer Institute (NCI)Enrollment32Breast Carcinoma In SituBreast Ductal Carcinoma In SituBreast Lobular Carcinoma In SituStage I Breast Cancer AJCC v7Stage IA Breast Cancer AJCC v7Stage IB Breast Cancer AJCC v7+7 more conditions
View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

This randomized phase I trial studies the side effects and best dose of endoxifen hydrochloride in treating participants who are undergoing breast surgery. Endoxifen hydrochloride may treat or reduce the risk of breast cancer.
clinicaltrials.gov ↗

Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

3 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States
  • Cedars-Sinai Medical Center

    Los Angeles, California, United States

  • Northwestern University

    Chicago, Illinois, United States

  • Memorial Sloan Kettering Cancer Center

    New York, New York, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

The drug and biological interventions registered on this study, normalized to their RxNorm ingredient where possible.

Endoxifen Hydrochloride
Linked drugs open the directory filtered to KOLs working with them.clinicaltrials.gov ↗

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start
31 Oct 2018
Primary completion
22 Feb 2021
Completion
12 Aug 2026
Last update posted
4 May 2026
Registered enrollment
32
Registry id
NCT03317405
clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 24 Aug 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.