My Blood Sugar is not under control and remains high inspite of taking medication and avoiding sugar and sugar based food.How to control it?

Start by understanding that ALL carbohydrates become sugar in the blood.  It is not just about avoiding "sugar" - it is about eating the RIGHT carbohydrates in the right amounts.  (a large plate of pasta is just as bad as a single serving candy bar)

Whole grains are better than white grains.  White grains digest quickly and cause a high sugar spike.  Bread and pasta should be limited per day and should be whole grain choices.  (same with rice - use brown instead of white rice)

Vegetables are usually good choices with a few exceptions.  Most vegetables are very low in carbohydrates and can be eaten ALMOST without limit.  The main exceptions are potatoes, corn, and peas.  These three very common vegetables are higher in carbohydrates than most other vegetables and they also cause a fast sugar spike.

Fruits are natural sugar and they are healthy.  Fruit shouldn't be missing from your diet - but you need to make the right choices and understand how much makes a single serving.  A diabetic shouldn't eat more than two servings of fruit per day.  Fresh fruit is better than canned fruit so that you can avoid the added sugars and heavy syrups.  Berries are the best choice and apples are also a great choice.   Citrus fruits might cause a higher sugar level than berries and apples.  

Even dairy has some carbohydrates.  Be sure to read labels and limit servings accordingly.  Unsweetened almond milk might be a better substitute in some situations than actually drinking milk.  (read the carbohydrates in milk - it might surprise you)

Meat from a butchers counter has NO carbohydrates.  Meat that is not breaded, processed, or coated in a sauce has no carbohydrates.  If you love meat - you really don't need to limit that.  Just be careful about breading and sauces.  Eggs are also carb free.  You can have a breakfast of eggs, bacon, ham, and sausage and have no carbohydrates involved at all.  (read labels on bacon - some bacon is processed with sugar - but it usually only adds 1 or 2 carbohydrates.)

You should talk with your doctor about daily carbohydrate goals or have your doctor recommend a dietitian you can have a consultation with.  You should have a per meal carbohydrate goal, a per snack carbohydrate goal and a per day carbohydrate goal.  This gives you a better idea of how much you should be able to eat before causing high sugar levels.  Again - eating the RIGHT carbohydrates are important too.

An example of daily goals could be 50 carbohydrates per meal, 20 carbohydrates per snack, and no more than 200 carbohydrates per day.  (this is just an example and your life style and activity levels may require more or less than this example goal.)

Also remember that getting some exercise can help with controlling diabetes.  Even just taking a 30 minute walk per day can make a difference. (walking is one of the most recommended exercises for diabetics)  

Do some research on "fast carbs" and "slow carbs".  As someone with diabetes - you would want to center as much of your diet as possible around foods that are low in carbs and are part of the "slow carbs" group.  

BTW - if you have a special event and want something that would usually be "off limits" - like a piece of cake - having no bread or pasta that day could leave room in your daily carb limits to have a special treat SOMETIMES.  After all - everyone needs a little cake sometimes.  

Good luck.   

Hopefully you are avoiding carbs and not just sugar. If you are overweight, lose weight. Add 30 minutes of exercise a day (even walking is great). And see your doctor - your medication may need to be adjusted (either increased, switched to something else, or taken combined with something else).

Your pancreas may be underperforming even more. Time to see your doctor.