For more than 25 years, multiple drug infusions through one injection point (multi-infusion) have been known to cause severe dosing errors. A large percentage of these errors can be avoided if the users of infusion technology have a better understanding of the equipment. Therefore, it is very important to create awareness and understanding of the physics and metrology involved to the users of infusion technology. This e-learning Module (eModule) aims at improving the general understanding of multi-infusion. The eModule is the result of the scientific activities of the project Standards and e-learning course to maximise the uptake of infusion and calibration best practices (Project Number: 15SIP03) funded by the European Metrology Research Programme (The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union).