As far as I see it, the song is about someone the singer had cared about deeply (lines 13-17) having been seriously injured, possibly to the point of brain death, or at least in a coma, and having to be kept alive artificially on a machine (the first six lines). And because of what happened, he became deeply disturbed; he attempted to use drugs to cope, but it didn't work, and only made things worse (lines 18-24). Because of his psychological breakdown, he's taken to a psychological hospital, either literally or metaphorically, but suddenly regains his thoughts for the person he cared for who was injured, and attempts to escape. (lines 24-32).