"We believe, and so suggested a few years ago, that the action of
alcohol on these chronic alcoholics is a manifestation of an allergy;
that the phenomenon of craving is limited to this class and never
occurs in the average temperate drinker. These allergic types can
never safely use alcohol in any form at all; and once having formed
the habit and found they cannot break it, once having lost their self-
confidence, their reliance upon things human, their problems pile up
on them and become astonishingly difficult to solve."

~Alcoholics Anonymous, 4th Edition, The Doctor's Opinion, pg. xxviii~