When you search on HERMES for the string "Bendroflumethiazide" you get no result (trying with the public version on ohdsi.org I get Your search for "Bendroflumethiazide" found no results. Press escape to change your search and try again.)
However, the associated concept is part of OMOP Vocabulary:
Not sure why this is however if you lowercase your search it returns the result. We added code to make the search case insensitive some time ago, but apparently there is a bug in there.
When you search on HERMES for the string "Bendroflumethiazide" you get no result (trying with the public version on ohdsi.org I get Your search for "Bendroflumethiazide" found no results. Press escape to change your search and try again.)
However, the associated concept is part of OMOP Vocabulary:
http://www.ohdsi.org/web/hermes/#/concept/1316354