lupus and diabetes

My younger brother is diabetic and recently he develop some skin changes, got diagnose of lupus, so I want to know can this disease make complications of diabetes and in which form. Is this combination of lupus and diabetes hazardous for my brother's health or it can be controlled by certain drugs?

Lupus is a chronic autoimmune disease and depending of clinical manifestation and stage of disease different kind of therapy is used. In severe cases, it can be treated with drug called corticosteroids. Long-term use of this category of drugs can cause diabetes, which have to be treated with drugs usually using for other kinds of diabetes.

Lupus is an autoimmune disease, which means that the body creates antibodies which attack its own tissues. Diabetes can be caused if the body is producing antibodies which attack the patient's insulin receptors. This is commonly the link when a patient has both diabetes and lupus.