CI

At a glance

ClinicalIndex Comparison Record
Phase 3Completed· 340 enrolled
Drug / intervention
Palbociclib +3 moredrug
Likely dose
Palbociclib 125mgfrom 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/NCT02297438
NCT02297438Phase 3Completed

A MULTICENTER, RANDOMIZED, DOUBLE-BLIND PHASE 3 STUDY OF PALBOCICLIB (ORAL CDK 4/6 INHIBITOR) PLUS LETROZOLE VERSUS PLACEBO PLUS LETROZOLE FOR THE TREATMENT OF PREVIOUSLY UNTREATED ASIAN POSTMENOPAUSAL WOMEN WITH ER (+), HER2 (-) ADVANCED BREAST CANCER

Pfizer·interventional·Posted Nov 21, 2014·Updated May 14, 2026

In Brief

A Phase 3 clinical trial evaluating Palbociclib, Letrozole, and 1 other intervention for Breast Neoplasms. Completed, enrolled 340 participants across 54 sites in 5 countries.

Detailed Summary

The study is designed to compare the clinical benefit following treatment with letrozole in combination with Palbociclib versus letrozole in combination with placebo in Asian postmenopausal women with ER(+)/HER2(-) advanced breast cancer who have not received prior systemic anti cancer therapies for their advanced/metastatic disease.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesChina, Hong Kong, Singapore, Taiwan, Thailand
Collaborators--

Timeline

Phase 3CompletedFinished
201520162017201820192020202120222023202420252026
First PostedNov 21, 2014
Enrollment StartMar 23, 2015
Primary CompletionAug 31, 2020
Study CompletionFeb 24, 2025
TodayJul 2, 2026
Enrollment to primary: 5.4 yearsPosted 11.6 years ago

Interventions

Palbociclibdrug

Palbociclib, 125mg, orally once daily on Day 1 to Day 21 of every 28-day cycle followed by 7 days off treatment

Letrozoledrug

Letrozole, 2.5mg, orally once daily (continuously)

Placebodrug

Placebo, 125mg, orally once daily on Day 1 to Day 21 of every 28-day cycle followed by 7 days off treatment

Letrozoledrug

Letrozole, 2.5mg, orally once daily (continuously)