Are injections not to menstruate effective for breast cancer, at the age of 50?
It’s called hormone blockage, and IT IS a standard treatment for cancer. Three official studies have shown it is as effective as chemo and a fourth has shown it’s even better, for estrogen positive cancers.

I’m not sure which injections you refer to, but anything with estrogen in it will make the breast cancer grow. Usual therapy for breast cancer includes lumpectomy, masectomy, chemo and/or radiation. The more quickly the disease is diagnosed, the greater the chance for remission.
TX Mom
I don’t know what you are referring to either, but that is not a standard treatment for breast cancer at any age.