Treatment
Tamoxifen clinical trials
We’re tracking 40 recruiting studies that include Tamoxifen, each written for real people, not researchers, below.
Recruiting studies
- NCT07502820RecruitingPhase 3
Personalized tamoxifen dosing for breast cancer
This trial tests whether adjusting the dose of tamoxifen based on your body's processing can improve treatment for hormone-sensitive breast cancer. It aims to find the best dose for you while keeping side effects manageable.
BoråsAges 18 years+ - NCT06914674RecruitingPhase 2
Tamoxifen for advanced pancreatic SPTP
This trial tests whether tamoxifen, a hormone therapy drug, can shrink or slow down advanced solid pseudopapillary tumors of the pancreas (SPTP) that have estrogen and progesterone receptors. It may be an option for people whose tumors cannot be removed by surgery or have come back after other treatments.
ShanghaiAges 14–80 - NCT04765098RecruitingPhase 2
Tamoxifen or Etoposide for recurring brain tumor after prior treatment
This trial tests whether tamoxifen works as well as etoposide in people whose glioblastoma has come back after standard chemotherapy and radiation with temozolomide. It aims to find a better medication option for controlling the tumor after the first return.
Edmonton, AlbertaAges 18–65 - NCT06434064RecruitingPhase 2
Tamoxifen and chemotherapy for triple negative breast cancer
This trial tests a combination of tamoxifen (a hormonal therapy) and pegylated liposomal doxorubicin (a type of chemotherapy) for people with triple negative breast cancer that has spread or cannot be removed by surgery. It aims to see if this combination can help people whose cancer has not responded to at least two prior treatments.
Buffalo, New YorkAges 18 years+ - NCT06364267RecruitingPhase 2
Low dose exemestane vs low dose tamoxifen for breast cancer prevention
This trial compares two low-dose medications, exemestane and tamoxifen, to see which is better at preventing breast cancer in postmenopausal women who have a higher risk. You would take one of these pills daily for a few years, and the study will check how well it works and what side effects occur.
Genova, ItalyAges Any age - NCT06320990RecruitingPhase 1
Tamoxifen to prevent cancer in pancreatic cysts
This trial tests whether tamoxifen, a hormone-blocking pill, can prevent pancreatic cysts from turning into cancer in people who are not having surgery to remove the cyst right away.
Omaha, NebraskaAges 19 years+ - NCT06195306RecruitingPhase 2
Low dose tamoxifen and omega-3 for breast cancer prevention
This study tests whether low-dose tamoxifen (a breast cancer prevention drug) or omega-3 supplements can lower breast cancer risk in postmenopausal women who are overweight and have a higher chance of getting the disease. The study lasts about 6 months and involves blood draws and a breast fluid test to see how the treatment affects breast cells.
Kansas City, KansasAges 45–74 - NCT06184750RecruitingPhase 2
Finding the best tamoxifen dose to lower breast cancer risk
This trial tests different doses of tamoxifen to find the best one for lowering breast cancer risk in premenopausal women. It aims to see if a lower dose works as well as the standard dose with fewer side effects.
Tucson, ArizonaAges 18–55 - NCT05941520RecruitingPhase 2
Acolbifene vs low-dose tamoxifen to prevent breast cancer
This Phase 2 trial compares acolbifene and low-dose tamoxifen to see which better lowers breast cancer risk in premenopausal women at high risk. You would be followed with health visits, blood tests, and a breast tissue sampling procedure.
Duarte, CaliforniaAges 35 years+ - NCT04852887RecruitingPhase 3
Testing shorter breast radiation after low-risk hormone breast cancer
This Phase 3 trial studies whether “less intense” radiation can work as well as standard radiation for certain early-stage hormone receptor–positive, HER2-negative breast cancers that have a low Oncotype DX score. It may help reduce treatment burden while keeping cancer control strong.
Birmingham, AlabamaAges 50–70 - NCT04740697Recruiting
Complementary therapies to help people stay on tamoxifen
This study looks at whether adding alternative or complementary supports can improve how well people stick with tamoxifen treatment for early hormone-related breast cancer. If it helps adherence, it may help people benefit more reliably from their prescribed therapy.
ToulouseAges 1.5 years+ - NCT04174352RecruitingEarly Phase 1
FES scan to guide tamoxifen for metastatic breast cancer
This early-phase study uses a special PET scan (FES PET/CT) to better match tamoxifen treatment to people with estrogen-receptor–positive breast cancer that has spread. It aims to see whether the scan results can help optimize tamoxifen use and potentially improve outcomes.
Madison, WisconsinAges 19 years+ - NCT03011684RecruitingPhase 3
Preserve eggs using tamoxifen and letrozole during new breast cancer treatment
This study tests whether taking tamoxifen and letrozole (with fertility injections) can help people with newly diagnosed, estrogen-sensitive breast cancer preserve eggs before cancer treatment starts. It may help protect future fertility by collecting eggs early, before chemotherapy or other treatments begin.
San Francisco, CaliforniaAges 18–50 - NCT04666961RecruitingPhase 2
Hormone therapy before surgery for extensive DCIS
This Phase 2 study tests whether taking hormone medicine before surgery can change the surgical plan and outcomes for people with extensive ductal carcinoma in situ (DCIS). It is for estrogen-receptor positive DCIS and aims to see how this “neoadjuvant” approach affects treatment decisions.
AngersAges 40 years+ - NCT05891093RecruitingPhase 3
Fluzoparib plus hormone therapy after surgery for breast cancer
This Phase 3 trial tests whether fluzoparib added to standard hormone (endocrine) therapy after early breast cancer surgery can improve outcomes and safety. It may help patients whose tumors are ER-positive, HER2-negative, and a specific SNF3 subtype.
Beijing, Beijing MunicipalityAges 18–70 - NCT07762885RecruitingPhase 3
Comparing skipping radiation after surgery for early-stage DCIS
This trial compares skipping radiation therapy after breast-conserving surgery for low- or intermediate-risk ductal carcinoma in situ (DCIS) – a very early, non-invasive breast cancer. It aims to see if omitting radiation is as effective as standard treatment while reducing side effects.
ShanghaiAges 40 years+ - NCT04985266RecruitingPhase 2
Watch blood DNA for early breast cancer return, then add palbociclib
This study checks for early signs that ER-positive, HER2-negative breast cancer may be coming back by testing your blood for cancer DNA. If signs are found, it tests whether adding palbociclib plus fulvestrant works better than standard hormone therapy alone to prevent recurrence.
AngersAges 18 years+ - NCT07581834RecruitingPhase 2
Dalpiciclib plus hormone therapy for early hormone-positive breast cancer
This study tests whether adding a new drug called dalpiciclib to standard hormone therapy improves outcomes for women with early-stage breast cancer that is hormone-receptor positive. The goal is to see if this combination is more effective and safe than hormone therapy alone.
Fuzhou, FujianAges 18 years+ - NCT07349069RecruitingPhase 3
HRS-8080 vs. standard hormone therapy for early breast cancer
This trial tests a new oral drug (HRS-8080) against standard hormone therapy for women with intermediate- or high-risk early breast cancer who have already completed 2 to 5 years of hormone treatment. It aims to see if the new drug can reduce the risk of cancer coming back.
Nanjing, JiangsuAges 18–75 - NCT07287098RecruitingPhase 2
Imlunestrant for premenopausal women with ER+/HER2- early breast cancer
This trial tests a new hormone-blocking pill (imlunestrant) in premenopausal women with early-stage ER+/HER2- breast cancer. Depending on whether you've had prior hormone therapy, the study will see if this treatment works better than standard options.
Birmingham, AlabamaAges 18 years+ - NCT07190443RecruitingPhase 3
Abemaciclib after local recurrence in HR+ HER2- breast cancer
This trial tests whether adding a targeted drug (abemaciclib) to standard treatment helps prevent breast cancer from coming back again after a local recurrence in women with HR-positive, HER2-negative breast cancer.
Koto-ku, TokyoAges 18 years+ - NCT07019363RecruitingPhase 3
CDK4/6 inhibitor plus hormone therapy for high-risk breast cancer
This trial tests whether adding a CDK4/6 inhibitor (a type of targeted pill) to standard hormone therapy after surgery can lower the risk of breast cancer coming back in women with high-risk, hormone-receptor-positive, HER2-positive early breast cancer.
ShanghaiAges 18–70 - NCT06979596RecruitingPhase 2
A study of MK-5684 for certain solid tumors
This trial tests an investigational drug called MK-5684 for people with specific types of breast, ovarian, or endometrial cancer. It aims to see if this treatment can help shrink or control the cancer when standard treatments have stopped working or are no longer effective.
Anchorage, AlaskaAges 18 years+ - NCT06942039RecruitingEarly Phase 1
Study of two drugs for young children with aggressive brain tumors
This trial tests a combination of chemotherapy drugs (topotecan given into the spine plus maintenance chemo) for children under 6 with high-risk embryonal brain tumors. The goal is to see if this approach can improve outcomes after initial treatment.
Calgary, AlbertaAges Up to 6 years
What Tamoxifen is being studied for
Conditions with recruiting Tamoxifen studies.
Common questions
- Are there clinical trials studying Tamoxifen?
- Yes. Clin2 currently lists 40 recruiting studies that include Tamoxifen, drawn from the U.S. registry and rewritten for real people so you can see what each is testing and who it's for.
- How do I know if I qualify for a Tamoxifen trial?
- Each study lists its own eligibility criteria — rules about condition, age, and prior treatments. On every Clin2 trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Is Tamoxifen an approved treatment?
- A drug being studied in a trial may be investigational (still being tested) or already approved and being studied for a new use. Each study page explains what phase it's in. Clin2 does not provide medical advice — talk with your doctor about whether Tamoxifen or a specific trial is right for you.
Related treatments
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. A drug appearing here is being studied in a trial and may be investigational. Talk with your doctor about whether a specific treatment or trial is right for you.