Researchers at Tel Aviv University have discovered in the laboratory that two existing medicines can be used to enhance treatments against bone cancer. It is important as bone cancer is often the result of metastasis (spreading) in breast cancer patients.
https://tps.co.il/articles/cocktail-of-repurposed-drugs-offers-hope-to-breast-cancer-patients/
https://aacrjournals.org/cancerdiscovery/article-abstract/doi/10.1158/2159-8290.CD-23-0762/734997/