My husband has been on Atenolol for years now & was diagnosed 3 years ago with type II diabetes. He has been taking Metformin, watching his diet & exercising. He has not been able to get his blood sugar to an acceptable level. I just read about a recent study done on beta blockers causing insulin resistance in the body specifically Atenolol. The study is recommending switching to Carvedilol which does not have an adverse effect on insulin resistance. Does anyone have any information or thoughts on this?