what are the side effects of januvia?
Januvia (sitagliptin) Side Effects: 1  Upper respiratory tract infections, nasal congestion, runny nose. 2  Headache. 3  Digestive distress, stomach pain, diarrhea. 4  Joint pain, arthritis. 5  Serious skin reactions (require immediate medical attention) 6  Pancreatitis. 7  Liver enzyme elevations. 8  Kidney damage.