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Morning or evening? new study tests best time for cancer pill.

NCT ID NCT07252726

Knowledge-focused Sponsor: Ottawa Hospital Research Institute Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jul 17, 2026 · Updated 1 time

Summary

This pilot study is testing whether taking endocrine therapy in the morning or evening makes a difference for people with metastatic breast or prostate cancer. Fifty participants will be randomly assigned to take their medication either within an hour of waking or within an hour of bedtime. The main goal is to see if a larger trial is possible, while also looking at quality of life, side effects, and how well the treatment works.

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 (CDK4/6 inhibitor or androgen receptor pathway inhibitor)
What this could lead to
If successful, this could show that simply changing the time of day you take your medication improves quality of life and treatment tolerability.
What could go wrong
This is a small pilot study with only 50 participants, so results may not apply broadly. The main goal is to see if a larger trial is possible, not to prove effectiveness.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

About 50 people

The number the study aims to enrol. It can still change while the study runs.

Started

Feb 2026

Expected to finish

Mar 2033

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Cohort A (Breast Cohort) Inclusion Criteria * Patients with metastatic hormonal receptor positive breast cancer * Plan to receive endocrine therapy and a CDK4/6 inhibitor (either Ribociclib or Palbociclib) in the first-line metastatic setting * Age ≥18 years * Able to provide oral consent * Willing and able to complete questionnaires as per study protocol Cohort A (Breast Cohort) Exclusion Criteria * Any contraindication in taking endocrine therapy and CDK4/6 inhibitor in the morning or evening * Plan to receive abemaciclib (as this requires twice a day dosing) Cohort B (Prostate Cancer) Inclusion Criteria * Patients with metastatic castrate sensitive prostate cancer * Plan to receive androgen receptor pathway inhibitor (either enzalutamide, apalutamide or abiraterone acetate) in combination with androgen deprivation therapy * Age ≥18 years * Able to provide oral consent * Willing and able to complete questionnaires as per study protocol Cohort B (Prostate Cancer) Exclusion Criteria * Any contraindication in taking androgen receptor pathway inhibitor in the morning or evening * Plan to receive darolutamide (as this requires twice a day dosing) * Plan to receive docetaxel in combination with androgen receptor pathway inhibitor

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Conditions

The condition(s) this trial relates to.

breast cancer breast carcinoma breast neoplasm hormone receptor-positive breast cancer metastatic prostate carcinoma Neoplasm Metastasis prostate cancer

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Metastatic breast cancer Metastatic prostate cancer

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    3 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Saskatoon Cancer Centre

    NOT_YET_RECRUITING

    Saskatoon, Saskatchewan, Canada

  • The Ottawa Hospital Cancer Centre

    RECRUITING

    Ottawa, Ontario, K1H 8L6, Canada

  • Waterloo Regional Health Network

    RECRUITING

    Kitchener, Ontario, Canada

More trials for these conditions

Other studies related to the condition(s) this trial covers.