<em>When treating a person with a psychological disorder, a therapist makes the assumption that the person's difficulties stem in large part from some unconscious conflicts that have produced anxiety. This therapist most likely identifies with the </em>psychodynamic <em>perspective of psychological disorders. </em>
I looks at some articles about it and found that it does occur following a viral illness however it never said anything about Antihistamines so I still might be wrong. If it is wrong please comment the right answer for other people to see.