• Insulin production is initially only moderately impaired in type 2 diabetes, so oral medication (often used in various combinations) can be used to improve insulin production (e.g., sulfonylureas), to regulate inappropriate release of glucose by the liver and attenuate insulin resistance to some extent (e.g., metformin), and to substantially attenuate insulin resistance (e.g., thiazolidinediones)

• According to one study, overweight patients treated with metformin compared with starvation alone, had relative risk reductions of 32% for any diabetes endpoint, 42% for diabetes related casualty and 36% for all antecedent mortality and stroke. Oral medication may eventually fail due to further impairment of beta cell insulin secretion
• At this point, insulin therapy is cardinal to maintain normal or near normal glucose levels.

Patients (usually with type 1 diabetes) may also initially present with diabetic ketoacidosis (DKA), an extreme state of metabolic dysregulation characterized by the detect of acetone on the patient's breath; a rapid, below breathing familiar as Kussmaul breathing; polyuria; nausea; vomiting and abdominal pain; Diabetic Supplies and any of manifold altered states of consciousness or arousal (such as hostility and mania or, equally, confusion and lethargy). In severe DKA, coma may follow, progressing to death. Diabetic ketoacidosis is a medical emergency and requires immediate hospitalization.