Substance or Medication Induced Anxiety Disorder
Most of the diagnostic criteria for the various disorders in the Fourth and Fifth Editions of the Diagnostic and Statistical Manual of Mental Disorders (American Psychiatric Disorder, 2000; 2013) require that the symptoms not be due to use of a medication or substance. This is an example of the reverse: the symptoms must coincide with or follow the use of a substance in order for the disorder to be identified and distinguished from other anxiety states.
The new and slightly altered criteria for anxiety disorder induced by a medication or substance are part of a substantial reconfiguring of this group of disorders in DSM-5, in which the DSM-4-TR anxiety disorders, which included phobias, repetitive behaviors and conditions arising from stress and trauma, were divided into 3 groups: anxiety, obsessive-compulsive and trauma and stressor-related disorders. Previous age requirements were also eliminated, a usual time course of 6 months or more for anxiety disorders was recognized and it was no longer considered necessary for the patient to recognize that his or her fears or worries were excessive or unreasonable.