any medicinal product which, when ready for use, contains one or more radionuclides (radioactive isotopes) included for a medicinal purpose, compounds that are used in medicine as sources of radiation for radiotherapy and for diagnostic purposes. They have numerous uses in research and industry., sisaldab radioaktiivseid isotoope ja teda kasutatakse diagnostilistel või ravi eesmärkidel organismi sisse viiduna või otseses kokkupuutes organismiga