The basic aim of treating any diabetic patient is to control the sugar levels tightly.
It doesn't matter how many tablets a person is taking.
All tne anti diabetic medicines are good but they should control your sugar levels.
There is no point in keeping your sugar uncontrolled even after taking the medicines.
In fact your doctor should increase the dose of medicines being given.
If sugar remains uncontrolled inspite of giving maximum possible dose of different medicines,the best would be to start the injection insulin