I have been seeing a DO since a year. He checked my brain MRI and is treating me according to my symptoms. I told him i have depression and anxiety and headache every often. Headache is once a week or so. He prescribed me butalb/caff/acetamino. He also told me i may have PTSD. He also prescribed cymbalta. My questions is what is cymbalta for, why he gave me that medicine? Does cymbalta has withdrawal symtomps later when i stop? What does it treats? Why do doctor prescribe cymbalta?