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Do breast cancer patients stick to their meds? new study aims to find out

NCT ID NCT06650423

Knowledge-focused Sponsor: Institute of Oncology Ljubljana 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This study will follow 319 women with early-stage, hormone-sensitive, HER2-negative breast cancer to see how well they take their prescribed aromatase inhibitors, with or without the added drug abemaciclib. Researchers will measure adherence using pill counts and questionnaires at 3 and 6 months. They also want to understand how quality of life, thinking skills, and attitudes toward medication affect adherence.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
aromatase inhibitors (letrozole, anastrozole, exemestane) with or without abemaciclib
What this could lead to
If successful, this study could reveal why some patients stop taking their breast cancer pills and help doctors improve long-term treatment adherence.
What could go wrong
This is an observational study, not a treatment trial. It will not test whether the drugs work better or worse, only how consistently patients take them.

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.

Participants

About 319 people

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

Started

Jan 2025

Expected to finish

Mar 2027

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.

Who is studied

Eligible adult women with early HR+ HER2- breast cancer patients.

Ages

18 to 99 years

Sex

Female participants only

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.

Inclusion Criteria: * Female, * Early HR+/HER-2- BC, * Patient is receiving adjuvant therapy with an aromatase inhibitor (letrozole, anastrozole or exemestane), with or without a CDK4/6 inhibitor abemaciclib, for no more than 18 months, * Treatment of BC is being conducted at OIL, * Patient has mandatory health insurance through Health Insurance Institute of Slovenia, * Patient understands Slovenian language, and * Patient agrees to participate in the study and provides written informed consent. Exclusion Criteria: * Metastatic HR+/HER2-negative breast cancer * Previous treatment for breast cancer with an aromatase inhibitor, with or without a CDK4/6 inhibitor, for early breast cancer prior to the current adjuvant treatment line

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm Her2-receptor negative breast cancer hormone receptor-positive breast cancer Medication Adherence

As listed by the trial registrant

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

Early breast cancer HER2-negative breast cancer Hormone receptor positive tumor

How to take part

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

  1. The places running it

    1 site. 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

  • Institute of Oncology Ljubljana

    RECRUITING

    Ljubljana, 1000, Slovenia

More trials for these conditions

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