Comprehensive, Evidence-based Guide to Effects of Drugs and Alcohol on Weight Gain or Loss

According to the American Psychiatric Association, substance abuse is the excessive use of substances, including alcohol and drugs, that cause an individual to suffer from clinical impairments as well as the dramatic loss of academic, professional, and social skills [1].

Substance abuse also dramatically alters the diet and in most cases, it leads to irregular eating patterns and poor nutrition. As a result, previously healthy adolescents and adults may begin to experience significant health problems shortly after the substance abuse begins.