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href="/web/20150407082528/http://www.whocc.no/atc_ddd_publications/">ATC/DDD publications</a><ul> <li><a class="chosen" href="/web/20150407082528/http://www.whocc.no/atc_ddd_publications/guidelines/">Guidelines</a></li> <li><a href="/web/20150407082528/http://www.whocc.no/atc_ddd_publications/atc_ddd_index/">ATC/DDD Index</a></li> <li><a href="/web/20150407082528/http://www.whocc.no/atc_ddd_publications/order/">Order</a></li> </ul></li> <li><a href="/web/20150407082528/http://www.whocc.no/use_of_atc_ddd/">Use of ATC/DDD</a></li> <li><a href="/web/20150407082528/http://www.whocc.no/courses/">Courses</a></li> <li><a href="/web/20150407082528/http://www.whocc.no/meetings_open_session/">Meetings/open session</a></li> <li><a href="/web/20150407082528/http://www.whocc.no/deadlines/">Deadlines</a></li> <li><a href="/web/20150407082528/http://www.whocc.no/links/">Links</a></li> </ul> </div> <div id="address"> <div> Postal address:<br/> WHO Collaborating Centre for Drug Statistics Methodology<br/>Norwegian Institute of Public Health<br/> P.O.Box 4404 Nydalen<br/>0403 Oslo<br/>Norway<br/><br/>Visiting/delivery address:<br/> Marcus Thranes gate 6<br/> 0473 Oslo<br/> Norway<br/> <br/> Tel:  +47 21 07 81 60<br/>Fax: +47 21 07 81 46<br/>E-mail: <script type="text/javascript"> /* <![CDATA[ */ m2='9d%mw`c8\'hdliqj'+'?rmjffEcml+kj\';'+'rmjffEcml+kj9*d'+';' for(i=0;i<m2.length;i++)document.write(String.fromCharCode(5^m2.charCodeAt(i))) /* ]]> */ </script><noscript>Du må slå på Javascript for å kunne lese denne epostadressen.</noscript> <br/>  <br/> <a href="/web/20150407082528/http://www.whocc.no/copyright_disclaimer/">Copyright/Disclaimer</a> </div> </div> </div> </div> <div id="content_padding"> <div id="content" class="two_col"> <div id="main_column" "> <div class="item last"> <h1 class="headline">Guidelines for ATC classification and DDD assignment</h1> <div class="body"><p><span>The guidelines describe the ATC classification system and the DDD methodology. The publication consists of a general part with information about the system and procedures and data requirements for ATC/DDD assignment and alterations. The second part of the publication, the interpretative guidelines, describes the different ATC levels down to the 4th level. The comments included vary from one ATC group to another. No comments are given if the establishment of ATC codes and DDDs are considered to cause no special problems. </span></p> <p><span>The interpretative guidelines should be consulted whenever the ATC/DDD system is used for drug utilisation research. They describe particular issues, which have been discussed and resolved by consensus of the working group. </span></p> <p><span>The guidelines are updated annually. The Guidelines can be ordered as a paper copy (English or Spanish versions) from the Centre (order form). A searchable version of the ATC/DDD Index linked to the text from the Guidelines is available on this website (ATC/DDD Index).</span></p> <p>Suggested citation: WHO Collaborating Centre for Drug Statistics Methodology,  Guidelines for ATC classification and DDD assignment, 2015. Oslo, 2014.</p> <p>A pdf version of the Guidelines is be available here:<a href="/web/20150407082528/http://www.whocc.no/atc_ddd_publications/order"></a></p> <p> <img src="/web/20150407082528im_/http://www.whocc.no/filearchive/publications/forside_guidelines.jpg" alt="Guidelines 2014" width="70" height="100"/></p> <p style="clear: both;"><a href="/web/20150407082528/http://www.whocc.no/filearchive/publications/2015_guidelines.pdf">Guidelines 2015</a> </p> <p style="clear: both;"><a href="/web/20150407082528/http://www.whocc.no/atc_ddd_publications/order">Order publications</a></p></div> </div> </div> <div id="last_updated"> <p><i>Last updated: 2014-12-16</i></p> </div> </div> </div> </div> <div id="left_bottom"> </div> </div> </body> </html>