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Rapid-Acting Insulin Analogue (Bolus)

Insulin Aspart

Brand names: NovoRapid, Fiasp (faster-acting)

Insulin aspart is a rapid-acting insulin analogue used at mealtimes to control postprandial glucose, in basal-bolus regimens, pumps and intravenously in specialist settings.

Dosing — being independently re-sourced

ClinCalc Pro is rebuilding its dose data from primary open sources — the manufacturer SmPC (eMC), the WHO Model Formulary and other official references — under clinician review. This drug's structured dose is not yet published here. Confirm all doses against the product SmPC and your local formulary before prescribing.

Clinical monograph

How it works

Modification of the insulin molecule speeds dissociation into monomers after injection, giving faster onset and shorter duration than soluble human insulin.

Prescribing in practice

  • Hypoglycaemia is the key risk; its rapid onset means it should generally be given just before or with food to match absorption.
  • As a high-alert medicine, prescribe units in words and specify the exact product and device to prevent errors.
  • Adjust timing and amount in renal or hepatic impairment and during changes in food intake or activity.

Monitoring

Monitor capillary blood glucose and HbA1c, paying particular attention to postprandial readings and hypoglycaemia.

Counselling the patient

  • Inject just before eating because it works quickly.
  • Carry fast-acting carbohydrate and know how to treat a hypo.
  • Rotate injection sites and never share your pen or needles.

Evidence & guidelines

Rapid-acting analogues improve postprandial control versus soluble human insulin and are widely recommended in diabetes guidance.

Reference: NICE NG17; ADA Diabetes Standards 2024; NovoRapid SPC; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.

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