**7. Conclusion**

Nuclear Medicine is a very promising field and will surely increase its relevance on diagnostics and therapeutics in the near future. Also within the field of drug development and drug‐ delivery systems research, it is expected to demonstrate an ever‐increasing applicability and importance. The advent of new and more complex drugs, combined with more ingenious and technological delivery systems, will call for a more detailed and effective *in vivo* studies during the development and regulatory phases of the research and marketing authorization process. Radiopharmaceuticals and Nuclear Medicine will therefore be predictably ever more used with the purpose of obtaining better, safer, and more reliable drug‐delivery systems.
