Apparently, the gunfights, mutinies, and notoriously demanding director on the cursed Miami Vice set are enough to drive a hard-drinking movie star straight to the overzealous ingestion of prescription medication for a back injury. Reports the AP:

Two days after the announcement of the abrupt end of Eminem's European tour, the reason for the cancellation has been upgraded from the classic "exhaustion" to "rehab for sleeping medication dependency." On the Publicist Excuse Matrix, "sleeping medication" (or any kind of relatively socially acceptable painkiller/prescription drug) usually equals "heroin," so interpret today's official statement accordingly.