A method of treating diabetes by administering Carvedilol in patients and diabetes mellitus. This method of treatment will eliminate the need for insulin and other blood sugar controlling agents in hypertensive patients with Type II diabetes mellitus, and will significantly reduce the required dosage of insulin and eliminate the need for other blood controlling agents in patients with Type I diabetes mellitus. This method will also delay and/or prevent the progression of non-insulin dependent Type II diabetes mellitus to insulin-dependent Type II diabetes mellitus. Moreover, this method has been shown to preserve improve insulin receptor sensitivity such that patients HbA1c level reaches and is maintained at or near 7% or less.
