What Are The Side Effects Of Januvia?

My mother is 72 yrs old now and has recovered from Hepatitis C after undergoing an interferon injection 2 years ago. Now, she is suffering diabetes and is given insulin injections daily and 100mg of Januvia. She gets her blood tested every threee month. From the doctor's observation, her SGOP & SGOT results are getting higher, about 50ml which is twice than normal, we are concerned if this might be a relapse sign of hepatitis C or a side effect/s from taking Januvia. While we are waiting for the hepatitis examination results. Please give your professional advise, thank you.