**2.1 Types of radiopharmaceutical products**

A radipharmaceutical (RPM) product contains a radionuclide in an adequate chemical form, the transporter, which conducts it towards the organ or tissue of interest, when it is administrated to the patient "in vivo" by ingestion, inhalation or intravenous injection. In the case of diagnosis the radionuclide is used as a "tracer", while in therapy it is employed due to the cytotoxic effect of the emitted ionizing radiations. The radiopharmaceuticals are presented as ingerable gelatin capsules (or solutions), injectable solutions and inhalation gases.
