Insulin aspart

Prandial Insulin·Endocrinology - Insulins & Injectables

Glycemic control at mealtimes in Type 1 and Type 2 DM

Authority requiredPBSINSULINNovoRapid, Fiasp (ultra-fast)Pre-filled pens or cartridge…+2

Max Dose

Titrated

Onset

10-20 mins

Hypoglycemia

HIGH RISK

Timing

WITH MEALS

Rapid Summary

Overview

Ultra-rapid-acting mealtime (prandial) insulin. Designed to perfectly mimic the physiological burst of insulin a healthy pancreas releases when food hits the stomach.

Maximum Dose

Titrated dynamically based on meal carbohydrate content or sliding scales.

Clinical Focus

Must be given immediately before eating. If the patient is injected and then the meal is delayed, they will suffer a severe hypoglycemic crash.

Bottom Line

Insulin aspart is a rapid-acting mealtime insulin for prandial glucose control and insulin pump therapy, but requires carbohydrate counting skill and carries significant hypoglycaemia risk if mistimed.

Formulation & Access

Brand Names

NovoRapid, Fiasp (ultra-fast)

Parenteral

Pre-filled pens or cartridges for SC injection (100 U/mL). Clear solution.

Prescribing & PBS

Authority Required (PBS).

Indications & Use

Primary

PBSTGA

Glycemic control at mealtimes in Type 1 and Type 2 DM. Correction of acute hyperglycemia.

Clinical Place

The 'Bolus' in the basal-bolus regimen.

Quick reference

Class & Role

Prandial Insulin — Ultra-rapid-acting mealtime (prandial) insulin.

Route / Formulation

Pre-filled pens or cartridges for SC injection (100 U/mL). Clear solution. (NovoRapid, Fiasp (ultra-fast))

Usual Dose & Max

SC Administered 5-10 minutes prior to a meal. Dose varies (e.g., 5-15 units per meal). Titrated dynamically based on meal carbohydrate content or sliding scales.

Key Indication Doses

Type 1 / Type 2 Diabetes: SC Administered 5-10 minutes prior to a meal. Dose varies (e.g., 5-15 units per meal). Hyperkalemia / DKA: IV Regular insulin (Actrapid) is preferred for IV infusions in ICU/ED, but rapid analogues can be used SC for correction doses.

Best Uses

Avoid / Cautions

During active hypoglycemia. Patient refusing to eat. Pregnancy Category A. Widely used in gestational diabetes.

Key Risks

Metabolic: Rapid, severe hypoglycemia if meals are skipped, delayed, or lack carbohydrates. HIGH — Weight gain. Dermatological: Lipohypertrophy at injection sites.

Key Interactions

Beta-blockers (masks hypo symptoms). Alcohol (blocks hepatic gluconeogenesis, exacerbating hypos).

Monitoring

BSL checks pre-meals. Ensure the food tray is physically on the table before the nurse administers the injection. Routine HbA1c.

Clinical Pearl

Fiasp is Insulin Aspart with added Niacinamide, which acts as a vasodilator. It absorbs even faster than NovoRapid. It can literally be injected *as* the patient takes their first bite of food.

Access

Authority requiredNovoRapid, Fiasp (ultra-fast)

Brand: NovoRapid, Fiasp (ultra-fast)
PBS status: Authority required