Cytoxan is a chemotherapy medication available in 50mg tablets, containing Cyclophosphamide as its active ingredient. It is utilized in the treatment of various types of cancers such as breast cancer, small cell lung cancer, and ovarian cancer. Cytoxan functions by disrupting the growth and proliferation of cancer cells, thereby helping to manage the disease. In international markets, this medication is also known under the brand names Endoxan and Cycloxan.