I upvoted this, but I think the headline is slightly misleading - I think they are saying that no one drug can cure all different types of addiction.<p>This seems, in a sense, almost self-evident; it is a bit like saying that it is impossible for one patch file to fix all possible bugs.<p>At the time of writing, one of the Wikipedia definitions of addiction was "a continued involvement with a substance or activity despite the negative consequences associated with it". Just like it takes some reasoning and domain specific knowledge to decide if something is a feature or a bug, it is not trivial to decide if a consequence is negative or positive, and requires a lot more logic than can be achieved with drugs binding to receptors in the brain.<p>Pleasure evolved because it makes animals do things which cause the genes for pleasure to be passed on (for example, eating food, having sex, or even more indirect things like solving a problem or acquiring knowledge to help achieve goals in the future). Addictions are really conditions where things which aren't useful to an individual invoke the pleasure pathways, because they are too recent for evolution to have got the pathways right, causing a distortion of priorities.<p>So it seems self-evident that any workaround to the distortion of priorities will need to specifically lower the pleasure / bump the pain of harmful things, relative to the beneficial things, rather than simply making everything unpleasurable by the same amount.