Psychological therapies are highly recommended for PTSD, above all other treatments. A commonly used therapy is cognitive behavioural therapy which is useful for many other mental health problems as well. For more severe cases, medication may be recommended. It is likely the medication would be a type of SSRI antidepressant. Medication is only usually used as a last resort in these circumstances. There is also a treatment called EMDR (eye movement desensitisation and reprocessing). The patient makes side-to-side eye movements (usually following an object or the therapist’s finger) while they remember and describe the traumatic event. It is unclear why EMDR works well when treating PTSD, but evidence suggests it does help to change negative thoughts relating to trauma.