Radiopharmaceutical is a radioactive pharmaceutical or chemical component required for diagnostic or remedial purposes. Radiopharmaceuticals for injection require complying with the radiation protection regulations and also apposite regulations for working in aseptic condition. All these regulations have been covered in the Good Radiopharmacy Practice guidelines. Working with radiopharmaceuticals involves a great amount of risks and the risks depend on the types of emission and the half-lives of the radioactive isotopes.