A tranquilizer is a drug that induces tranquility.

Tranquilizer may also refer to:

"Tranquilizer", a song written by Tom Stephan with vocals by Neil Tennant, from album Superchumbo "WowieZowie" (2005) "Транквилизатор" ("Tranquilizer"), a song by the Soviet band Кино (Kino) from the album Nachalnik Kamchatki (1984) Tranquilizer (album), an album by Oneohtrix Point Never

See also Tranquil (disambiguation) Tranquillity Sedative Tranquillizer gun