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Diabetes has many complications, so it is not just to bring down the numbers but to monitor and treat complications associated with diabetes. Check your eyes for retinopathy, kidneys with urine albumin creatinine ratio, and check your feet.
Lifestyle modifications are the best treatment for diabetes. Take a low carbohydrates diet and no added sugar. No sugary juices, bread, rice, pasta, and potatoes. If you cannot stop, at least take as little as possible. Take more vegetables, salads, and fibers. Consume fruits only as a sweet dish. Do not take mango, grapes, and banana. Do not take apple not more than one piece. Strawberries and other berries are fine to take along with peach, apricot, and small amounts of plums.
Intermittent fasting will also help you to control your diabetes. You can fast for 16 hours, like taking your dinner at 7 pm and not eating anything after that. Next, you can take breakfast at 11 am. During fasting, drink water and green tea without sugar. You can extend fasting to 24 hours then 36 hours as your body adopts. You can do fasting two times a week, or as you feel comfortable, it will control your sugar.
Drink more water. Sleep well. Do exercise at least walk 30-40 minutes daily. The more you practice these things, the better will be your control. Check your sugar frequently. Your fasting target should be 90-130. Two hours after eating, it should be 150-160. HbA1c should be less than 7. These targets can vary in individual patient depending upon his diabetes duration and other relevant issues.
In my opinion, it is not a good idea to take insulin after you find out that your sugar is high and then bring it down fast. It creates big fluctuations in your sugar levels, meaning one time it is high, and after a few minutes it is down. This is not good. Actually you should check your sugar more frequently one in the morning before breakfast if it is in the range as I above mentioned no need to take any insulin. Then check your sugar before lunch, and the same rule applies and check it after eating as well. I mean that if your sugars are higher after eating only, you should start taking insulin just before meals, like 15-20 minutes before eating, so there should not be a surge in level. How much should you take? That depends on two things: one how much is your sugar before eating and how much carbohydrates are you going to eat. But before considering to bring down your sugars after eating, first bring in control the fasting sugars. Better is to take basal insulin-like Glargine, which comes in the trade name of Lantus at night. You can start it like six units and then increase every day 1-2 units if your fasting sugars are higher than 120-130.
If your fasting is in range, then no need. If it goes less than 70, then decrease about 3/4 units the next day. Once your fasting sugar is in range, then we concentrate on after eating sugar. That should be near 150. You can start to take Novo rapid only at your main meal and take it just before meal if you find after eating sugars are higher than range. Your HbA1c should be less than 7. Another important issue is if you have any of the diabetes complications other than eyes as you mentioned.
You should check urine albumin creatinine ration at least one a year to check how your kidneys are doing. Do you have any heart issues? How about ur blood pressure and cholesterol levels? It is not just to bring sugar number down but to keep the whole body healthy, as I mentioned above. Check your diet and lifestyle modifications as above. Low carbohydrate diet and intermittent fasting, as I mentioned above, will help you a lot. If you could practice it well, I hope you may not even need insulin, and your Metformin will be enough.