Grey Literature is a field in library and Information science that deals with the production, distribution, and access to multiple document types produced on all levels of government, academia, business, and organization in electronic and print formats not controlled by commercial publishing (i.e. where publishing is not the primary activity of the producing body). Our purpose is to direct you to health sciences focused literature that might otherwise be lost because it is not indexed in our commonly used tools such as PubMed, CINAHL, Web of Science, etc.
Find abstracts and presented papers at conferences that may never see the light of day beyond the presentation at the conference.
Complete searches should include these regional indices. Much of the literature in these indices is not indexed in the standard health literature databases such as MEDLINE, CINAHL, etc.
These are just a few of the registers that may be overlooked in searches. Google drug companies by name to check for additional registries.