Credo Reference-Substance-induced DisordersAn umbrella term for any ORGANIC MENTAL DISORDER that is intimately related to excessive and/or chronic consumption of a substance that has direct effects on the central nervous system. Most commonly these disorders are caused by psychoactive drugs taken nonmedically to alter mood or behaviour, e.g. alcohol, barbiturates, amphetamines, cannabis, opiates, cocaine. A host of specific substance-induced disorders can be found in the clinical literature, e.g. substance-induced anxiety disorder, substance-induced psychotic disorder, etc. For the meanings of each, look under the entry for the form of the disorder and treat it as though the condition were brought about by substance abuse. In cases where the condition lasts for a considerable length of time, the word ‘persistent’ is often inserted, e.g. substance-induced persistent amnesia.