Hello doctor, my mother is a nephro patient. She has a diabetes problem for side effect of pednisolen tablet near about 2 months ago. After proper medication she had no problem on sugar only one tablet linagliptin 5 mg is eaten per day. Now this tablet is out of market near about me so as composition I bought vildagliptin 50 mg. So,is that proper tablet in replace of linagliptin 5 mg. Pls help me.