&gt; What behavioral&#x2F;psychological changes are there beyond those associated with the regular consumption of any addictive substance?<p>Not many, and that&#x27;s precisely the point: in terms of additivity, the neural receptors involved are essentially the same as those involved in other drugs; and in terms of toxicity, it&#x27;s metabolized essentially the same as alcohol. Give a fruit juice or a whisky to a 4-year old, and it&#x27;s about the same (minus the dizzy high of&#x2F;c).