My Dr. recently gave me a sample pen of Byetta to use for one month. I am almost finished with this pen and will be getting a script for the 10mg pen shortly. My Dr. informed me that this medicine is not cheap but couldn't give me any other information. I was wondering what others are paying on a monthly basis for their pens? I realize everyone will be different because of different insurance but would like to get a rough idea of what to expect when I got to pick it up.