Stimulant-induced anxiety transtorno including amphetamines, methamphetamine and methcathinone is characterised by anxiety symptoms (e.g., apprehension or worry, fear, physiological symptoms of excessive autonomic arousal, avoidance behaviour) that develop during or soon after intoxicação or abstinência due to stimulants. The intensity or duration of the symptoms is substantially in excess of anxiety symptoms that are characteristic of Stimulant intoxicação or Stimulant abstinência. The amount and duration of stimulant uso must be capable of producing anxiety symptoms. The symptoms are not better explained by a primary mental transtorno (e.g., an Anxiety and fear-related transtorno, a Depressive transtorno com prominent anxiety symptoms), as might be the case if the anxiety symptoms preceded the onset of the stimulant uso, if the symptoms persist for a substantial period of time after cessation of the stimulant uso or abstinência, or if there is other evidence of a pre-existing primary mental transtorno com anxiety symptoms (e.g., a history of prior episodes not associated com uso of stimulants).