Potential participants will be screened as per inclusion and exclusion criteria by trained research staff. These patients will already have a clinically diagnosed PTSD by a psychiatrist and any other co-morbid diagnoses would have been previously confirmed by the physician. However, for research purposes a diagnosis of PTSD will be confirmed through a structured clinical interview specifically the MINI (Mini International neuropsychiatric Interview) and the Clinician-administered PTSD Scale for DSM5- past month version (CAPS5). CAPS5 will also be used to rule out exclusion criteria of severe depersonalization and derealization. The scales will be administered by a trained research staff and confirmed by a psychiatrist. The MINI will also be used to assess for presence of current suicidality. If the total score on Questions C1 and C2 is more than 5 then this will be reported to the PI who will further assess the patient for safety and risk assessment. If the participant is above the age of 65 years of age they will also be asked to complete a cognitive screening test (Mini Mental State Examination, MMSE) to ensure they are not suffering from any significant cognitive impairment