Overview
Sponsor-declared trial summary
Phase
Human pharmacology (Phase I) - Other
Status
Ended
Participants planned
12
Countries
1
Sites
1
locally advanced or metastatic HR+/HER2- breast cancer
Key facts
- Sponsor
- Pfizer Inc.
- Participant type
- Healthy volunteers
- Age range
- 18-64 years, 65+ years
- Gender
- Male and Female
- Therapeutic area
- Diseases [C] - Neoplasms [C04]
- Trial duration
- 20 Aug 2025 → 5 Nov 2025
- Decision date (initial)
- 2025-07-15
- Transition trial
- No
- Low-intervention
- No
- Rare-disease indication
- No
- Vulnerable population
- No
Trial design
CTIS Part I — objectives, methods, condition coding
Conditions and MedDRA coding
locally advanced or metastatic HR+/HER2- breast cancer
| Version | Level | Code | Term | System organ class |
|---|---|---|---|---|
| 28.0 | PT | 10085481 | Hormone receptor positive HER2 negative breast cancer | 100000004864 |
| 28.0 | PT | 10065430 | HER2 positive breast cancer | 100000004864 |
Sponsors and contacts
Sponsor organisations, regulatory contacts, third parties
Pfizer Inc.
- Sponsor organisation
- Pfizer Inc.
- Address
- 66 Hudson Boulevard East
- City
- New York
- Postcode
- 10001-2189
- Country
- United States
Scientific contact point
- Organisation
- Pfizer Inc.
- Contact name
- Clinical Medical Lead
Public contact point
- Organisation
- Pfizer Inc.
- Contact name
- Clinical Medical Lead
Locations
1 EU/EEA country · 1 investigational sites
By country
| Country | MS status | Planned subjects | Sites |
|---|---|---|---|
| Belgium | Ended | 12 | 1 |
| Rest of world | — | 0 | — |
Investigational sites
Country notifications
Trial-start, recruitment-start, end and early-termination notifications submitted per Member State
| Country | Trial start | Trial end | Recruitment start | Recruitment end | Early termination |
|---|---|---|---|---|---|
| Belgium | 2025-08-20 | 2025-11-04 | 2025-08-26 | 2025-09-04 |
Application history
2 submissions — initial application plus substantial / non-substantial modifications
| # | Type | Code | Submitted | Reference MS | Conclusion | Decision date |
|---|---|---|---|---|---|---|
| 1 | INITIAL | IN | 2025-06-05 | Belgium | Acceptable 2025-07-15
|
2025-07-15 |
| 2 | SUBSTANTIAL MODIFICATION | SM-1 | 2025-07-29 | Belgium | Acceptable | 2025-08-19 |