Insulin is a hormone produced in the pancreas that regulates glucose (sugar) levels in the blood. Insulin therapy is a treatment method in which artificial insulin is introduced into the body to compensate for insufficient levels of natural insulin caused by diabetes, hypoglycemia (low glucose levels) or other diseases. Insulin therapy is prescribed when indicated, for example, after therapy, to control blood sugar levels (hypoglycemia is a sign of unrecognized or poorly diagnosed diabetes mellitus or drug or alcohol intoxication). If the sugar level is unstable, then doctors indicate the dose of insulin for a certain period of time and determine individual measures to improve the effectiveness of this therapy. The most effective is repeated insulin therapy, which is performed every eight hours. The most critical times when insulin administration is necessary to maintain normal blood sugar levels are from two hours to four o'clock in the morning, and from four o'clock in the evening to five to six o'clock in the evening. During this time, the intense rate of testosterone production suppresses the secretion of growth hormone, which can lead to an undesirable increase in carbohydrate levels and cause hyperinsulinemia. Recurrent exacerbations most often occur in the very early morning and late afternoon hours. The benefits of repeat insulin therapy depend on its accuracy. During a sudden attack, a diabetic patient should be given an insulin injection and given additional rapid-acting insulin as soon as possible. Sometimes success can only be restored with additional insulin injections. Repeated insulin therapy is one of the most commonly used treatments for type 1 diabetes.