to keep it strong. (elephant noise) (donkey noise) hey candidates, answer the call already. (vo) if you have type 2 diabetes, you may know what it's like to deal with high... and low blood sugar. januvia (sitagliptin) is a once-daily pill that, along with diet and exercise, helps lower blood sugar. januvia works when your blood sugar is high and works less when your blood sugar is low, because it works by enhancing your body's own ability to lower blood sugar.