In 2008 the EANM published their paediatric dosage card. In 2011 the North American consensus guidelines recommended a set of administered activities for paediatric nuclear medicine. During the EANM congress in 2012 a working group of the EANM and the SNMMI met to study the possibility of harmonizing these guidelines. The purpose of this work was to identify differences between these guidelines and suggest changes in both guidelines to achieve a level of harmonization. In addition, the new version of the EANM paediatric dosage card (version 01.02.2014) is provided.