Hi, some gliptins such as Sitagliptin can cause side effects.
But it is very, very, very, very rare unless you have pancreatic cancer before.
discuss it with your GP, there are other meds out there!
sitagliptin replaces metformin if you are having issues with the side effects from metformin. It is also prescribed because of insulin resistance and low first phase insulin response to carbs.
Have you tried dietary changes, for example reducing your carb intake further?