I almost never post in this forum (I don't juice), but this question caught my eye as I was surfing. You need to be very, very careful if you are a diabetic and thinking about taking anabolics. Diabetes, by nature of the disease and its effects on lipid metabolism, leads to a predisposition for arteriosclerosis. Combine this with the increased risk for hypertension and athersclerosis associated with anabolics, you are playing with a big increase in the risk of coronary artery disease.
Anabolic steroids will also affect blood glucose.... in low doses they tend to lower blood glucose. In higher doses (like many bodybuilders take), they tend to cause blood glucose to rise, sometimes significantly depending on the drug. If you are not monitoring yourself closely, this means taking anabolics can cause hyperglycemia. You will have to adjust your insulin intake if you are insulin dependant. Done without your doctors guidance, this can lead to hypoglycemia.
Finally anabolics alter protein, lipid, and carbohydrate metabolism. Not only that, but typically those on anabolics (or at least the users I know) will consume more calories. This alone means an adjustment in medication and/or insulin needs.
As a diabetic, its probably safer if you leave the anabolics alone. If you are insulin dependant, remember you are already taking a powerful anabolic simply to survive. Work hard to keep your blood glucose levels in control and reap the rewards of what you have to take to stay alive.
JK