Morning or evening? study tests best time for breast cancer pill to ease side effects
NCT ID NCT04864405
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looked at whether taking hormone therapy for breast cancer in the morning or evening reduces side effects and helps patients stay on treatment. 245 women with early-stage breast cancer were randomly assigned to take their medication either within an hour of waking or within an hour of bedtime. Researchers tracked changes in side effects and quality of life over 12 weeks using a standard questionnaire.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
endocrine therapy (hormone-blocking medication)
What this could lead to
If successful, this could help breast cancer patients choose the best time of day to take their medication to feel better and stick with treatment.
What could go wrong
This is a small, completed Phase 4 trial focused on side effects, not on curing cancer. The results may not apply to all patients or change standard care.
Disclaimer
Read more
Show less
This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for BREAST CANCER are added.
By submitting, you agree to our Terms of use
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Show contact details
Enter your email to view the contact information for this study.
By submitting, you agree to our Terms of use
Locations
-
The Ottawa Hospital Cancer Centre
Ottawa, Ontario, Canada
-
Thunder Bay Regional Health Sciences Centre
Thunder Bay, Ontario, P7B 6V4, Canada