Bicalutamide drug, molecular model. Bicalutamide is a drug used in the treatment of prostate cancer and hirsutism. It is an oral non-steroidal anti-androgen that works by binding to androgen receptors. Known under various brand names, it was first marketed in 1995. The molecular formula is: C18.H14.F4.N2.O4.S. Atoms (spheres) are colour-coded: carbon (light grey), hydrogen (white), fluorine (green), nitrogen (blue), oxygen (red), and sulphur (yellow).