Guidelines for ATCvet classification 2021 ISSN 1020-9891 ISBN 978-82-8406-167-2 Suggested citation: WHO Collaborating Centre for Drug Statistics Methodology, Guidelines for ATCvet classification 2021. Oslo, 2021. © Copyright WHO Collaborating Centre for Drug Statistics Methodology, Oslo, Norway. Use of all or parts of the material requires reference to the WHO Collaborating Centre for Drug Statistics Methodology. Copying and distribution for commercial purposes is not allowed. Changing or manipulating the material is not allowed. Guidelines for ATCvet classification 23rd edition WHO Collaborating Centre for Drug Statistics Methodology Norwegian Institute of Public Health P.O.Box 222 Skøyen N-0213 Oslo Norway Telephone: +47 21078160 E-mail:
[email protected] Website: www.whocc.no Previous editions: 1992: Guidelines on ATCvet classification, 1st edition1) 1995: Guidelines on ATCvet classification, 2nd edition1) 1999: Guidelines on ATCvet classification, 3rd edition1) 2002: Guidelines for ATCvet classification, 4th edition2) 2003: Guidelines for ATCvet classification, 5th edition2) 2004: Guidelines for ATCvet classification, 6th edition2) 2005: Guidelines for ATCvet classification, 7th edition2) 2006: Guidelines for ATCvet classification, 8th edition2) 2007: Guidelines for ATCvet classification, 9th edition2) 2008: Guidelines for ATCvet classification, 10th edition2) 2009: Guidelines for ATCvet classification, 11th edition2) 2010: Guidelines for ATCvet classification, 12th edition2) 2011: Guidelines for ATCvet classification, 13th edition2) 2012: