Topical or Oral Minoxidil for the Treatment of Endocrine Therapy-Induced Alopecia in Patients With Stage I-IV Breast Cancer

This study is testing whether topical (applied to the scalp) or oral minoxidil can help with hair loss in women with breast cancer who are taking hormone-blocking therapies like tamoxifen or aromatase inhibitors. Hair thinning is a distressing side effect that many women experience on these long-term treatments. **You may be eligible if...** - You are a woman aged 18 or older - You have been diagnosed with breast cancer (any stage) - You are currently taking tamoxifen or an aromatase inhibitor (with or without ovarian suppression) - You have noticed hair loss since starting endocrine therapy **You may NOT be eligible if...** - You have known hair loss from other causes (like thyroid disease or alopecia areata) - You are currently using other treatments for hair loss - You have significant heart or kidney problems - You are pregnant or breastfeeding - You have an allergy to minoxidil Talk to your doctor to see if this trial is right for you.