👉 Thiotepa is a medication used to treat certain types of cancer. It works by blocking a protein called epidermal growth factor receptor 2 (EGFR) on the surface of cancer cells, which can help stop them from growing and dividing. This treatment has been found to be effective in some cases of advanced prostate cancer, but it is not always effective for other types of cancer. If you or someone else needs more information about thiotepa, please consult a healthcare professional.