D-Tox is a 2002 film directed by Jim Gillespie and starring Sylvester Stallone. The film was released internationally by United International Pictures. It was not released in the US until three years later, where it was given a limited release under the title Eye See You.
FBI agent Jack Malloy is sent to a former government-controlled asylum to recuperate from alcoholism. There, he meets several other alcoholic ex-cops and veterans. However, a blizzard forms and seals them in the asylum with no form of communication. Worse, a psychopath is lurking among them, killing both staff and Malloy’s comrades one by one.
Summary via Wikipedia.