"The Perfect Drug" is a 1997 song by Nine Inch Nails. It was written for the David Lynch film Lost Highway and originally appeared on the Lost Highway soundtrack. Remixes of the song were released in an EP, "The Perfect Drug" Versions (also known as Halo 11). Though "The Perfect Drug" Versions acts as a single for the titular song, the original version does not appear on the American single. A slightly extended version of "The Perfect Drug" has also been included on the foreign singles "We're in This Together Read more on Last.fm.