BDZ

BDZ may refer to:
 * Benzodiazepines, a class of drugs
 * Bulgarian State Railways (Balgarski Darzhavni Zheleznitsi in Bulgarian)
 * BDZ (album), a 2018 album by Twice
 * "BDZ" (song), a song from the album
 * bdz, the ISO 639-3 code of the Badeshi language