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Concept
Insulin (medication)
Summary
As a medication, insulin is any pharmaceutical preparation of the protein hormone insulin that is used to treat high blood glucose. Such conditions include type 1 diabetes, type 2 diabetes, gestational diabetes, and complications of diabetes such as diabetic ketoacidosis and hyperosmolar hyperglycemic states. Insulin is also used along with glucose to treat hyperkalemia (high blood potassium levels). Typically it is given by injection under the skin, but some forms may also be used by injection into a vein or muscle. There are various types of insulin, suitable for various time spans. The types are often all called insulin in the broad sense, although in a more precise sense, insulin is identical to the naturally occurring molecule whereas insulin analogues have slightly different molecules that allow for modified time of action. It is on the World Health Organization's List of Essential Medicines. In 2020, regular human insulin was the 307th most commonly prescribed medication in the United States, with more than 1 million prescriptions.
Insulin can be made from the pancreas of pigs or cows. Human versions can be made either by modifying pig versions, or recombinant technology using mainly E. coli or Saccharomyces cerevisiae. It comes in three main types: short–acting (such as regular insulin), intermediate-acting (such as neutral protamine Hagedorn (NPH) insulin), and longer-acting (such as insulin glargine).
Insulin was first used as a medication in Canada by Charles Best and Frederick Banting in 1922.
This is a chronology of key milestones in the history of the medical use of insulin. For more details on the discovery, extraction, purification, clinical use, and synthesis of insulin, see Insulin
1921 Research on the role of pancreas in the nutritive assimilation
1922 Frederick Banting, Charles Best and James Collip use bovine insulin extract in humans at Connaught Laboratories in Toronto, Canada.
1922 Leonard Thompson becomes the first human to be treated with insulin.
1922 James D. Havens, son of former congressman James S.
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Insulin glargine
Insulin glargine sold under the brand name Lantus among others is a long-acting modified form of medical insulin, used in the management of type I and type II diabetes. It is injected just under the skin. Effects generally begin an hour after use. Common side effects include low blood sugar, problems at the site of injection, itchiness, and weight gain. Other serious side effects include low blood potassium. NPH insulin rather than insulin glargine is generally preferred in pregnancy.
Insulin analog
An insulin analog (also called an insulin analogue) is any of several types of medical insulin that are altered forms of the hormone insulin, different from any occurring in nature, but still available to the human body for performing the same action as human insulin in terms of controlling blood glucose levels in diabetes. Through genetic engineering of the underlying DNA, the amino acid sequence of insulin can be changed to alter its ADME (absorption, distribution, metabolism, and excretion) characteristics.
Diabetes
Diabetes mellitus, often known simply as diabetes, is a group of common endocrine diseases characterized by sustained high blood sugar levels. Diabetes is due to either the pancreas not producing enough insulin, or the cells of the body becoming unresponsive to the hormone's effects. Classic symptoms include thirst, polyuria, weight loss, and blurred vision. If left untreated, the disease can lead to various health complications, including disorders of the cardiovascular system, eye, kidney, and nerves.