FreeDiams is a drug prescribing assistant that manages drug-drug interactions, patients allergies, intolerances and high quality printing. FreeDiams is a free and open source application, GPLv3.
FreeDiams can manage multiple drugs databases. Are available:

• USA: FDA
• France: AFSSAPS
• South Africa: SAEPI
• Canadian: HCDPD

The 0.5.0 version brings drugs interactions calculation on all available drugs databases (US, CA, FR and ZA). FreeDiams is available for MacOs, Windows and Linux (Debian, OpenSuse, Ubuntu, Fedora). Link to website.