# Evaluating the Dose Timing (Morning vs Evening) of Endocrine Therapy and Its Effects on Tolerability and Compliance

> **NCT04864405** · PHASE4 · COMPLETED · sponsor: **Ottawa Hospital Research Institute** · enrollment: 245 (actual)

## Conditions studied

- Breast Cancer

## Interventions

- **OTHER:** Morning administration of endocrine therapy
- **OTHER:** Evening administration of endocrine therapy

## Key facts

- **NCT ID:** NCT04864405
- **Lead sponsor:** Ottawa Hospital Research Institute
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2021-06-30
- **Primary completion:** 2022-09-05
- **Final completion:** 2023-07-29
- **Target enrollment:** 245 (ACTUAL)
- **Last updated:** 2026-01-08


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04864405

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04864405, "Evaluating the Dose Timing (Morning vs Evening) of Endocrine Therapy and Its Effects on Tolerability and Compliance". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT04864405. Licensed CC0.

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