Well either way, you're killing yourself. Maybe not intentionally killing yourself, but you're intentionally taking drugs which ends up killing you.

I dunno, I guess I think a lot of things are "killing yourself" that most people don't normally consider so. Like if you're driving carelessly and cause a wreck that you're killed in, I'd say that's killing yourself, even if unintentionally. Your death is your fault, therefore you killed yourself.