I Pass for Human

Jane's lover Dax overdoses on heroin. Wanting to kill the pain of loss, Jane does dope for the first time and is soon on the way to addiction herself. She then discovers that drug users are being haunted by the ghosts of dead addicts. Soon she's being followed by her dead boyfriend Dax as well as other thirsty spirits. Jane meets Rick, a young man with his own similar story... (imdb)