My father age is 68 years. He has sugar level of 180(fasting), 277(PP). His BP level is 120/80. Earlier one month before, his BP was 150/90. Diabetic doctor prescribed him Janumet tablet, after using this medicine for seven days, his BP was reduced to 120/75. Now he stopped taking Janumet, only taking Gemer tablet in the morning. Is this BP level with diabetic is normal ? Pl advise..