Evaluation of the availability, use and impact of the NF is best integrated with existing, regular monitoring and evaluation activities. In addition, specific surveys and/or interviews can also be conducted and the results of these, together with the written and verbal comments received from users, should be carefully considered in the review process.
The most recent edition of the WMF should be used in the scheduled revision of the NF and information from the updated WMF texts should be carefully transferred into subsequent editions of the NF.
During the review process, clear procedures will need to be established to cover deletion, addition and modification of entries in the revised NF as well as possible changes in scope and presentation.
Figure 2.1. Overview of the development and maintenance of a national formulary
WMF, WHO model formulary.