Clicking on the History button on the left navigation bar opens the History page. Selecting the Database update history tab the updates are listed and they can be searched.

The following filters are available to narrow the search:

Legislation code (from-to numbers)

Update date (from-to dates)

Substance ID (from-to numbers)

Legislation name (free text search)

Update type (ADD/UPDATE/DELETE drop-down)

This table is sorted by the Substance id and clicking on a line opens the Database update history data popup with the details: Example, Name, Synonyms, CAS#, Legislation, Reference, DEA# and the Query molecule. Titles of modifications are highlighted in red.