... I have been taking for a long time. For many years I just took that and my sugar was controlled. This year the doctor added on onglyza 5mg and then after a few months later the doctor added metformin 500mcg. So I take all these three medicines once a day at the same time which is night time. My sugar levels fasting in the morning are 160 to 170. Any idea of when I should take them and sometimes i get lows the next day late afternoon. Need advise as to when to take them or which one should I drop.