Casodex (bicalutamide) is an oral medication used in the treatment of advanced prostate cancer. It belongs to a class of drugs known as anti-androgens, which work by blocking the action of male hormones (androgens) like testosterone that can promote the growth of prostate cancer cells. Casodex is typically used in combination with other treatments, such as luteinizing hormone-releasing hormone (LHRH) analogs, to reduce testosterone levels and slow the progression of the disease. The medication is taken once daily, and its use is closely monitored by a healthcare provider to manage any side effects and ensure optimal treatment outcomes.