Epirubicin hydrochloride is widely used in chemotherapy for treating various types of cancer, including breast cancer, stomach cancer, and lung cancer. It works by interfering with the DNA replication process in cancer cells, preventing their growth and proliferation. In clinical settings, it is often administered intravenously as part of combination therapy to enhance its effectiveness. The drug is particularly valued for its ability to target rapidly dividing cells, making it a key component in both adjuvant and neoadjuvant cancer treatments. Additionally, it is used in palliative care to alleviate symptoms and improve the quality of life for patients with advanced-stage cancers. Proper dosage and monitoring are essential to minimize side effects, such as cardiotoxicity and bone marrow suppression.