How many days an insulin can be applied needs to be decided based on the patient’s specific blood glucose profile, and the condition of the diabetes. There are many types of insulin, including rapid-acting insulin, premixed insulin, and long-acting insulin. If it is with oral medication, usually choose long-acting insulin, combined with meal-time regulator this treatment, insulin can be injected once a day. If the long-acting long-acting insulin, the dosage is smaller, the application time will be longer, some patients may only apply a dozen units of insulin per day, this one insulin can be applied close to a month. In the case of a combination of three short and one long insulin therapy, the short-acting insulin is generally applied in larger amounts.