lol. seems that they purposely try and reserve the term 'addiction' for non-psychiatric medications. one way of trying to keep the distinction is to build in a 'pleasure' component to substances that are addictive. trouble with this is that the absence of withdrawal can be a pleasure... basically, there is no principled distinction but they don't want to put people off taking the drugs (ahem medications)

lol

http://en.wikipedia.org/wiki/Addicti...s_of_addiction