Currently the Food and Drug Administration publishes radiopharmaceutical information for physicians to choose appropriate medical diagnosis and therapy for their patients. The primary functions of these radiopharmaceuticals are diagnosis and delivering doses to a patient with appropriate energy, biological half life, chemical behavior, and radiological half life. These radiopharmaceuticals preferentially react with certain type of cells. Diagnosis or therapy must be accurately prepared for and planned by medical professionals. The fast access to the internet has become a key tool for medical professionals to obtain this type of information. A web page has been developed that links nuclear and biological data to radiopharmaceutical information. Queries can be performed on this database to sort the radiopharmaceuticals by radiological half life, gamma energy, biological half life, medical application, chemical information or other parameters. This capability allows medical professionals and scientists to select radiopharmaceuticals by their characteristics. There are approximately 100 medical isotopes in the database. / Graduation date: 2000