I was originally taking 60 mg of Cymbalta, started the 30th of October 2018. It made me really tired and had really dry eyes. So i cut back to 30 mg about three weeks ago. Still tired and having a bit of a hard time concentrating on some things. I took fluoxetine for two years before the Cymbalta. I want to go back on the fluoxetine again. I was originally taking 60 mg of fluoxetine before starting Cymbalta. How do i switch back from Cymbalta to fluoxetine?