Sorry!

    In 1972, the American Psychiatric Association created a definition of drug abuse that used legality, social acceptability, & even cultural familiarity as qualifying factors:

…as a general rule, we reserve the term drug abuse to apply to the illegal, nonmedical use of a limited number of substances, most of them drugs, which have properties of altering the mental state in ways that are considered by social norms and defined by statute to be inappropriate, undesirable, harmful, threatening, or, at minimum, culture-alien.