Enzurem Enzalutamide Capsules 40 mg is a medication used primarily to treat prostate cancer, specifically metastatic castration-resistant prostate cancer (mCRPC). It is an androgen receptor inhibitor, meaning it works by blocking the action of androgens (male hormones like testosterone) on prostate cancer cells. Androgens stimulate the growth of prostate cancer cells, so by inhibiting this process, enzalutamide helps to stop or slow down the cancer's growth.