Mood transtorno induced by unknown or não especificado psychoactive substance is characterised by mood symptoms (e.g., depressed or elevated mood, decreased engagement in pleasurable activities, increased or decreased energy levels) that develop during or soon after intoxicação com or abstinência from a specified psychoactive substance. The symptoms are not better explained by a primary mental transtorno (e.g., a Depressive transtorno, a Bipolar transtorno, Transtorno esquizoafetivo), as might be the case if the mood symptoms preceded the onset of the uso of the unknown or não especificado psychoactive substance, if the symptoms persist for a substantial period of time after cessation of the uso of the unknown or não especificado psychoactive substance or abstinência from the unknown or não especificado psychoactive substance, or if there is other evidence of a pre-existing primary mental transtorno com mood symptoms (e.g., a history of prior episodes not associated com the uso of the unknown or não especificado psychoactive substance).