The FreeMedForms project includes the FreeDiams application. FreeDiams is a free and open source pharmaceutical drug prescribing assistant that manages patient drug allergies, drug intolerances and drug-drug interactions in both the drug selection and prescribing steps. FreeDiams manages multiple drug databases (FDA, French, Canadian, South African). FreeDiams is world-unique free and open source software that manages drug-drug interactions informed by referenced scientific sources. Technically, FreeDiams is FreeMedForms' EMR drug assistant plugin, built as a standalone application. Its computations are fully integrated with FreeMedForms but can, at the same time, be linked to any application thanks to its command line parameters. GNUmed has adopted FreeDiams as a "drug expert system". Recently, the FreeMed and SynapseEHR teams began work to port FreeMedForms' drug interaction engine/data to an open source webportal for drug-drug interactions-checking.