Diabetic and other patients are treated using an aggressive form of Pulsed Insulin Therapy in which a pre-treatment blood sugar level in the patient of at least 250-300 mg/dL, and the patient is treated with at least first and second cycles, each cycle comprising (1) pulsing a recombinant human insulin to the patient in concentrations of more than 10% to achieve a target intra-treatment blood sugar level (BSL) swing of more than 100 mg/dL, and (2) raising the blood sugar level to at least 250-300 mg/dL.