CI

At a glance

ClinicalIndex Comparison Record
Phase 4Completed· 245 enrolled
Drug / intervention
Morning administration of endocrine therapy +1 moreother
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04864405
NCT04864405Phase 4Completed

A Pragmatic Randomised, Multicentre Trial Evaluating the Dose Timing (Morning vs Evening) of Endocrine Therapy and Its Effects on Tolerability and Compliance (REaCT-CHRONO)

Ottawa Hospital Research Institute·interventional·Posted Apr 28, 2021·Updated Jan 8, 2026

In Brief

A Phase 4 clinical trial evaluating Morning administration of endocrine therapy and Evening administration of endocrine therapy for Breast Cancer. Completed, enrolled 245 participants across 2 sites.

Detailed Summary

Endocrine therapy is an established treatment for hormone receptor-positive breast cancer, but can cause significant side effects with deterioration in quality of life. The side effects of all forms of endocrine therapy are well recognized and can lead to treatment non-persistence or non-compliance. Chronotherapy, also called chronotherapeutics, is defined as the administration of a medication in coordination with circadian rhythm in order to minimize side effects and yield a greater efficacy. The investigators propose to perform a pragmatic, multi-centre, open-label, randomized clinical trial to establish the optimal timing (morning vs. evening) of administering endocrine therapy based on side effects and benefits in early stage breast cancer patients.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsBreast Cancer
CountriesCanada
Collaborators--

Timeline

Phase 4CompletedFinished
20222023202420252026
First PostedApr 28, 2021
Enrollment StartJun 30, 2021
Primary CompletionSep 5, 2022
Study CompletionJul 29, 2023
TodayJul 2, 2026
Enrollment to primary: 1.2 yearsPosted 5.2 years ago

Interventions

Morning administration of endocrine therapyother

Endocrine therapy administered within one hour of patient wake up time

Evening administration of endocrine therapyother

Endocrine therapy administered within one hour of the patient bed time