Xbira 250mg pills, which contain Abiraterone Acetate, are primarily used for the treatment of prostate cancer. Specifically, they are indicated for:

Metastatic Prostate Cancer: Xbira is used in combination with prednisone or prednisolone in patients with metastatic castration-resistant prostate cancer (mCRPC) who have previously received chemotherapy containing docetaxel.

Hormone-Sensitive Prostate Cancer: In some cases, Xbira may also be prescribed in combination with prednisone or prednisolone for the treatment of metastatic hormone-sensitive prostate cancer (mHSPC), particularly in patients who are at high risk of developing symptoms related to their disease.

The medication works by inhibiting the enzyme CYP17, which is involved in the production of androgens (male hormones) in the body. By blocking this enzyme, Xbira helps reduce the levels of androgens that can stimulate the growth of prostate cancer cells, thereby slowing down the progression of the disease.