Poly-addiction and the Problem of Switching AddictionsDrug Addiction InfoBy Promises AustinJanuary 3, 2013“Polysubstance dependence” is listed as a substance disorder in the Diagnostic and Statistical Manual of Mental Disorders-IV-TR (DSM-IV-TR) published in 2000, the latest revision of the manual used by mental health professionals to diagnose and treat mental health illnesses. Polysubstance dependence is diagnosed when a person meets the criteria for dependence on a group of…