UPDATE (April 2, 2013): Before you take Byetta, Victoza, Onglyza, or Januvia please read about the new research that shows that they, and probably all incretin drugs, cause severely abnormal cell growth in the pancreas and precancerous tumors. You'll find that information HERE.
Original Post:
There's a new and troubling problem connected with DPP-4 inhibition. Read about it here:
New Safety