OpenDrugWiki – Using a Semantic Wiki for Consolidating, Editing and Reviewing of Existing Heterogeneous Drug Data Anton Köstlbacher 1 , Jonas Maurus 1 , Rainer Hammwöhner 1 , Alexander Haas 2 , Ekkehard Haen 2 , Christoph Hiemke 3 1 University of Regensburg, Information Science Universitätsstr. 31, 93053 Regensburg, Germany 2 University of Regensburg, Clinical Pharmacology, Department of Psychiatry Universitätsstr. 31, 93053 Regensburg, Germany 3 University of Mainz, Neurochemical Laboratory, Department of Psychiatry Untere Zahlbacher Str. 8, 55131 Mainz, Germany; anton.koestlbacher@sprachlit.uni-r.de; rainer.hammwoehner@sprachlit.uni-r.de; jonas@maurus.net; ekkehard.haen@klinik.uni-regensburg.de; hiemke@mail.uni-mainz.de Abstract. The ongoing project which is described in this article pursues the integration and consolidation of drug data available in different Microsoft Office documents and existing information systems. An initial import of unstructured data out of five heterogeneous sources into a semantic wiki was performed using custom import scripts. Using Semantic MediaWiki and the Semantic Forms extension, we created a convenient wiki-based system for editing the merged data in one central application. Revised and reviewed data is exported back into production systems on a regular basis. Keywords: drug database, medical information system, semantic wiki, data conversion 1 Introduction PsiacOnline 1 , a drug interaction database for psychiatry in German speaking countries, was released in 2006. As of 2010 it contains over 7000 drug interactions with comprehensive information on pharmacological mechanisms, effects and severity of each interaction. Strong emphasis lies on guidance how to handle interactions in practice. [1] 1 PsiacOnline is an online service offered by SpringerMedizin: http://www.psiac.de