Cymbalta?

My psychiatrist wants me to start Cymbalta. I was diagnosed with ADHD a couple of years ago and doctors have come to the conclusion that I also have GAD. I have been on methylphenidate for the past nine months, and my psychiatrist wants me to start Cymbalta to help with the anxiety since it hasn't faded with the attention issues. I'm seeing a wide array of reactions (side effects, withdrawal, attentionissues, etc.), to this med, particularly from people who were cross-diagnosed/medicated for ADHD.

Has anyone tried this? How was it?