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Abstract
Substance misuse is a widespread problem throughout society. As drug abuse results in various social and economic costs, researchers have been investigating the impact of drug abuse for several decades. In the past, studies on drug abuse have focused on adolescence. Therefore, we have learned a great deal about the prevalence, predictors, and consequences of drug abuse in this developmental period. Furthermore, various theoretical models have been postulated explaining the relationship between drug abuse in adolescence and into early adulthood. However, in comparison to the empirical knowledge of drug abuse in adolescence, less is known about drug abuse during the developmental period of adulthood. Therefore, in order to get a comprehensive picture of how drug abuse impacts adults, several aspects of adult functioning must be addressed to determine the extent of the psychosocial impact of drug abuse in adulthood. The purpose of this study is to gain a comprehensive understanding of the relationship between drug abuse in an adult’s life by examining the association between drug abuse and psychological, interpersonal, occupational, and social factors in adulthood.