Dora Richardson

Dora Nellie Richardson (June 1, 1919- September 15, 1998) was a British organic chemist, known for first synthesizing Tamoxifen (ICI-46,474), a groundbreaking targeted therapy for hormone-sensitive breast cancer, in England in 1962. Her research marked a turning point in oncology. Tamoxifen's ability to selectively block estrogen receptors revolutionized breast cancer treatment by offering a more precise and less toxic alternative to traditional chemotherapy. Her pioneering work laid the foundation for modern endocrine therapies and remains a cornerstone of breast cancer treatment today. Richardson was named on several patents.