[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [Pharmacology](https://durgical.com/en/pharmacology/) › [Insulins](https://durgical.com/en/pharmacology/classes/insulins/) › Insulin aspart [Pharmacology](https://durgical.com/en/pharmacology/) · [Insulins](https://durgical.com/en/pharmacology/classes/insulins/) # Insulin aspart A rapid-acting insulin analogue for meals and pumps. One amino acid change lets it break apart and enter the blood quickly. Updated 2026-11-01 - Class: [Insulins](https://durgical.com/en/pharmacology/classes/insulins/) - Receptor: Insulin receptor - ATC code: A10AB05 - WHO Model List of Essential Medicines ## ⚠ High-alert medication An error with this medicine can cause serious harm: double checks and protocols are used. ◎**Insulin receptor**Insulin aspart ⓘ The figure shows human insulin bound to site 1 of an insulin receptor fragment. Aspart differs only at B28 and binds the same site. **Target in 3D:** Insulin receptor. PDB structure 4OGA (RCSB PDB, public domain). [View the structure at RCSB PDB](https://www.rcsb.org/structure/4OGA) · Drag to rotate · pinch to zoom ## Mechanism of action In insulin aspart the proline at B28 is replaced by aspartic acid. The added negative charge reduces self-association, so the hexamers dissociate rapidly into monomers after injection and are absorbed faster than regular insulin. Once in the blood it acts on the insulin receptor exactly like human insulin. - Aspartate at B28 reduces self-association - Monomers are absorbed rapidly from under the skin - Activates the insulin receptor like human insulin - Covers the glucose rise of a meal ## Pharmacokinetics **Absorption** Subcutaneous, faster than regular insulin; intravenous use only under medical supervision. **Half-life** Apparent half-life after a subcutaneous injection of about 81 minutes in the label's study. **Onset and duration** Injected 5 to 10 minutes before a meal; the greatest glucose-lowering effect occurs between 1 and 3 hours after injection. ## Indications - Mealtime and correction insulin in type 1 diabetes, by injection or pump [Type 1 diabetes mellitus →](https://durgical.com/en/conditions/type-1-diabetes-mellitus/) - Mealtime insulin in type 2 diabetes [Type 2 diabetes mellitus →](https://durgical.com/en/conditions/type-2-diabetes-mellitus/) ## Adverse effects ### Common - Hypoglycemia - Weight gain - Injection-site reactions and lipodystrophy - Low potassium ### Serious (rare, important) - Severe hypoglycemia - Hyperglycemia and ketoacidosis if an insulin pump fails - Severe allergic reactions (rare) ## Contraindications - During an episode of hypoglycemia - Hypersensitivity to insulin aspart or an excipient ## Key interactions **Beta-blockers, clonidine** Can blunt the warning signs of hypoglycemia. **Other glucose-lowering drugs** Raise the risk of hypoglycemia. **Corticosteroids, diuretics, atypical antipsychotics, niacin** Reduce the glucose-lowering effect. **Thiazolidinediones (pioglitazone)** Fluid retention and possible heart failure. ## What is monitored - Blood glucose before and after meals - Glucose and potassium closely during intravenous use - HbA1c - Pump and injection sites ## Administration and safety - Subcutaneous injection shortly before a meal, or continuous subcutaneous infusion by pump. - Intravenous use only under medical supervision, with close checks of glucose and potassium. - In a pump it is not diluted or mixed with other insulins. - Look-alike risk with premixed aspart products: the label is checked before every dose. ## Nursing care - Before: blood glucose and confirmation that the meal is available. - After: watch for hypoglycemia in the first hours. - Review the dose with the team if the patient cannot eat. - Teach pump users to recognize pump failure and to have a backup injection plan. ## Pregnancy and breastfeeding Rapid analogues such as aspart are used in pregnancy; insulin needs change by trimester and glucose is checked often. ## Memory aid «Aspart = Aspartate at the start of the meal»: one aspartate at B28 and the insulin is ready in minutes. ## Test yourself Think of the answer, then tap the question to see it. ## Which single change makes insulin aspart rapid acting? Proline B28 is replaced by aspartic acid, which reduces self-association so the insulin dissociates quickly into monomers. ## When does aspart's glucose-lowering effect peak after a subcutaneous injection? Between about 1 and 3 hours after the injection. ## What extra monitoring is needed when aspart is given intravenously? Close blood glucose and potassium monitoring, under medical supervision, to avoid hypoglycemia and hypokalemia. [Add to my cards (3)](https://durgical.app/estudiar/?add=/en/pharmacology/insulin-aspart/) ## Related drugs - [Insulin lispro](https://durgical.com/en/pharmacology/insulin-lispro/) - [Insulin glulisine](https://durgical.com/en/pharmacology/insulin-glulisine/) - [Regular human insulin](https://durgical.com/en/pharmacology/regular-human-insulin/) ## Related conditions - [Type 1 diabetes mellitus](https://durgical.com/en/conditions/type-1-diabetes-mellitus/) - [Type 2 diabetes mellitus](https://durgical.com/en/conditions/type-2-diabetes-mellitus/) [← Back to the class: Insulins](https://durgical.com/en/pharmacology/classes/insulins/) Educational content on how drugs work; not a prescribing guide and no substitute for a health professional's advice. No doses are given. Sources: [Insulin Aspart (rDNA Origin) Injection: MedlinePlus Drug Information](https://medlineplus.gov/druginfo/meds/a605013.html) (MedlinePlus (U.S. National Library of Medicine), 2025); [DailyMed - INSULIN ASPART injection, solution](https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=bee5b358-c863-420b-be73-ced2e920c499) (DailyMed (U.S. National Library of Medicine), 2026); Goodman & Gilman's The Pharmacological Basis of Therapeutics, 14th ed., ch. 51 (McGraw Hill, 2023); [ATCDDD - ATC/DDD Index](https://atcddd.fhi.no/atc_ddd_index/?code=A10AB05) (WHO Collaborating Centre for Drug Statistics Methodology, 2026). ## **Spotted a mistake?** We are always improving for the community. Tell us what is wrong and our team will review it. Report a mistake Representative model, for educational purposes only. --- Source: https://durgical.com/en/pharmacology/insulin-aspart/ License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/pharmacology/insulin-aspart/