My wife started taking Byetta about a week or a little over ago. She has been complaing of shoulder and back pain ever since. I am not sold on the drug and Im pretty skeptical about. She may have lost about 3 to 5 pounds since she started taking it but I am real concerned about the side effects. As I said she has shoulder and back pain, she has diarhea and while she may eat less at each meal she gets hungry in between meals. she also seems to get thirstier, especially at nite. How much or if any of this is Byetta side effects and how long do they persist. After a month she is supposed to increased to 10mgs and im concerned. Thank you, Concerned husband, Mark