welome to hcm
the sugar values that you have mentioned indeed are in the diabetic range.
you need to check your fasting values (morning empty stomach) and 2 hrs after breakfast to know your baseline readings.
in caase you are already on treatment may be you need to look into your lifestyle ,eating habits first.
it is essential that the most important part of controlling diabetes
is weight reduction, diet control ,regular exercise.
eat little amounts of meals every 3-4 hours, cut off all sweets.
if you are able to maintain a healthy lifestyle and recheck the readings you can reduce your need to take tablets for diabetes, though cannot avoid it altogether.
wish you a good health.