Recently diagnosed type 2 diabetes fasting bgl is around 300. can get upto 400 after meals i am on pills - should i be given insulin to lower it?

Maybe but it depends: 2 schools of thought regarding how to treat newly diagnosed type 2 diabetes. One is to use pills (perhaps several) especially b/c most people are squeamish about giving themselves shots. Other opinion is to start w/insulin to aggressively lower sugars & protect pancreas. I'm not convinced either is right for everyone. So for now, i let my patients chose. Regardless, nutrition & exercise are key.

Time will tell.: If it remains persistently high i would say so. Sometimes new onset diabetics with your numbers can return to adequate control with just orals and diet / exercise and wt loss, but i would say that is the exception. If you are taking more than two oral meds ( metformin plus glipizide) should strongly consider Insulin rather than adding third oral agent.