Prandial Insulin·Endocrinology - Insulins & Injectables

Insulin aspart

Glycemic control at mealtimes in Type 1 and Type 2 DM

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

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At a glance

Max Dose

Titrated

Onset

10-20 mins

High risk: Hypoglycemia

HIGH RISK

Timing

WITH MEALS

Cautions

Avoid / Cautions

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

Where it stands

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.

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

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

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