How accurate is it that long-term use of tenormin (atenolol) causes diabetes mellitus?

Tenormin (atenolol) & Diabetes: Tenormin (atenolol) is a beta-blocker class of medication. There are a few studies that show it might cause diabetes, but this is not my clinical experience. Rather, since there are beta receptors in areas of the liver and pancreas, on these meds the body has difficulty detecting blood sugar levels and actually blood sugar levels can drop and because the heart rate won't go up on these meds, you may not know.