Lapatinib
Estrogen-Receptor Positive Breast Cancer
Explore 74 assets in Estrogen-Receptor Positive Breast Cancer →Floatz Rating
BB64/100
Confidence
Indicative
Sponsor
National Cancer Institute (NCI)
Modality
Small molecule
Development Phase
Phase 3
Status
Dormant
Evidence ledger · v0.2
Clinical Evidence
Clinical track record: trial progression, reported outcomes, safety signals, and endpoint quality.
52High confidence
Detailed axis rationale is planned and will be published soon.
| Trial | Phase | Status | N | Primary endpoint | Readout |
|---|---|---|---|---|---|
NCT01281163CT.gov Lapatinib Ditosylate and Akt Inhibitor MK2206 in Treating Women With Metastatic Breast Cancer | — | Terminated | — | — | — |
NCT00390455CT.gov Fulvestrant With or Without Lapatinib in Treating Postmenopausal Women With Stage III or Stage IV Breast Cancer That is Hormone Receptor-Positive | — | Completed | — | — | — |
NCT00118157CT.gov Lapatinib and Tamoxifen in Treating Patients With Locally Advanced or Metastatic Breast Cancer That Did Not Respond to Previous Tamoxifen | — | Completed | — | — | — |
Competitive Position
Competitive setting: how crowded the indication is, class-level failures, and timing against rivals.
89High confidence
Detailed axis rationale is planned and will be published soon.
Same indication · Estrogen-Receptor Positive Breast Cancer
| Asset | Sponsor | Phase | Rating |
|---|---|---|---|
| Lapatinib (this asset) | National Cancer Institute (NCI) | P3 | BB · 64 |
| Exemestane | National Cancer Institute (NCI) | P4 | BBB |
| Everolimus | UNC Lineberger Comprehensive Cancer Center | P4 | BBB |
| Tamoxifen | Dana-Farber Cancer Institute | P4 | BB |
| Giredestrant | Hoffmann-La Roche | P3 | BB |
| Palbociclib | Forward Pharmaceuticals Co., Ltd. | P3 | BB |
| Capivasertib | Imperial College London | P2 | BB |
| Abemaciclib | Jonsson Comprehensive Cancer Center | P3 | BB |
| Ribociclib | National Cancer Institute (NCI) | P3 | BB |
+42 more in the Estrogen-Receptor Positive Breast Cancer cohort
Other indications for Lapatinib
| Indication | Sponsor | Phase | Rating |
|---|---|---|---|
| Breast Carcinoma | — | P3 | BB · 67 |
| Male Breast Carcinoma | — | P3 | BB · 67 |
| Breast Cancer | — | P3 | BB · 64 |
Scientific Foundation
Strength of the underlying biology: target validation, tractability, modality fit, and how related mechanisms have fared.
NR
Planned for methodology v0.2.
Development Feasibility
How realistically the program can be executed, drawing on modality precedent, enrollment dynamics, and sponsor delivery.
NR
Planned for methodology v0.2.
Commercial Opportunity
Commercial prize: addressable population, unmet need, and the value case for the indication.
NR
Planned for methodology v0.2.
IP & Exclusivity
Exclusivity position, covering patent protection and freedom-to-operate runway.
NR
Planned for methodology v0.2.
Manufacturing & Supply
Manufacturing and supply readiness, driven by modality process and scale-up risk.
NR
Planned for methodology v0.2.
Related assets
Citation
Floatz Terminal. Lapatinib in Estrogen-Receptor Positive Breast Cancer. Methodology v0.2. Rated under v0.2 effective July 8, 2026. Last refreshed July 8, 2026. Accessed July 13, 2026. https://terminal.floatz.ai/assets/lapatinib-estrogen-receptor-positive-breast-cancer
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