Insulin lispro
Insulin lispro
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Insulin lispro

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Insulin lispro

Insulin lispro, sold under the brand name Humalog among others, is a modified type of medical insulin used to treat type 1 and type 2 diabetes. It is delivered subcutaneously either by injection or from an insulin pump. Onset of effects typically occurs within 30 minutes and lasts about 5 hours. Often a longer-acting insulin like insulin NPH is also needed.

Common side effects include low blood sugar. Other serious side effects may include low blood potassium. Use in pregnancy and breastfeeding is generally safe. It works the same as human insulin by increasing the amount of glucose that tissues take in and decreasing the amount of glucose made by the liver.

Insulin lispro was first approved for use in the United States in 1996. It is a manufactured analogue of human insulin where two amino acids have swapped positions. In 2023, it was the 84th most commonly prescribed medication in the United States, with more than 8 million prescriptions. It is on the World Health Organization's List of Essential Medicines.

Insulin lispro is used to treat people with type 1 diabetes or type 2 diabetes. People doing well on short-acting insulin should not routinely be changed to insulin lispro, but may benefit from some advantages like flexibility and responsiveness.

Common side effects include skin irritation at the site of injection, hypoglycemia, hypokalemia, and lipodystrophy. Other serious side effects include anaphylaxis, and hypersensitivity reactions.

Through recombinant DNA technology, the final lysine and proline residues on the C-terminal end of the B-chain are reversed. This modification does not alter receptor binding, but blocks the formation of insulin dimers and hexamers. This allows larger amounts of active monomeric insulin to be immediately available for postprandial injections.

It is a manufactured form of human insulin where the amino acids lysine and proline have been switched at the end of the B chain of the insulin molecule. This switch of amino acids mimics Insulin-like growth factor 1 which also has lysine (K) and proline (P) in that order at positions 28 and 29.

Insulin lispro (brand name Humalog) was granted marketing authorization in the European Union in April 1996, and it was approved for use in the United States in June 1996.

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