<prompt> Post traumatic stress disorder is characterized by all except-Flash back and night mareSevere traumatic injuryRe - experiencing stressful eventsIt doesnt develop after 6 months of stress  <response>: Ans. is d i.e., It doesnt develop after 6 months of stress o Symptoms of PTSD develop within 6 months of stressor, however 10 patients have delayed onset.Post traumatic stress disordero According to ICD - 10, this disorder arises as a delayed andor protracted response to an exceptionally stressful or catastrophic life event or situation, which is likely to cause pervasive distress in almost any person e.g. disasters, war, rape or torture, serious accident.o The symptoms of PTSD may develop, after a period of latency, within six months after the stress or may be delayed beyond this period.o The classical triad of PTSD includeHvper-arousai Anxiety, irritability, insomnia, poor concentration, Hypervigilance.Intrusions Reexperience of traumatic eventthrough intrusions in distressing thought, dream Nightmares, FlashbacksAvoidance Avoidance of stimuli thoughts, activites, places or people that arouse recollection of trauma.Treatmento Treatment of PTSD involve both behavior therapy and pharmacotherapyBehavioral therapy Cognitive behavior therapy CBT is the treating of choice. Other forms of psychotherapy for PTSD are exposure therapy, eye movement desensitization and reprocessing EMDR, and stress management.Pharmacotherapy Drugs used for PTSD are Antidepressants SSRIs, TCAs MAOIs, Antianxiety drugs BDZs, Buspirone, Carbamazepine, Valproate, Propranolol, clonidine. 