This is going to sound completely stupid, and I am sorry for that :( but be sure to drink a ton of water throughout the time you are coming off the Cymbalta. While you are feeling poorly, it will help your body tremendously to keep well-hydrated, not to mention that our bodies need water to flush out toxins and regulate its chemical balances. Water is essential anyway, but it is even more important when we are sick (from any cause).
Use lots of ice, flavor it with a bit of juice if you need it to taste good. Whatever, however... try to get at least 60 oz. a day (that's 3 - 20 oz. bottles) ... I know most of us don't get anywhere near that much, and it's hard on our bodies to try to process and flush out our meds without sufficient water comin' in.
Hope it goes well for you, better than you expect.
Bailey