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Anti-factor XIIa monoclonal antibody

Garadacimab

Brand names: Andembry

Garadacimab is a monoclonal antibody used for the long-term prophylaxis of attacks in hereditary angioedema.

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

It inhibits activated factor XII (factor XIIa), reducing activation of the contact (kallikrein-kinin) system and thereby decreasing bradykinin-mediated angioedema attacks.

Prescribing in practice

  • It is intended for routine prevention of attacks, not for treating an acute attack, so patients must retain access to a recognised acute hereditary angioedema treatment.
  • Use under specialist supervision for confirmed hereditary angioedema and counsel on injection technique where self-administration is used.
  • Consider bleeding risk and refer to the SPC before use in patients on anticoagulants or with bleeding disorders.

Monitoring

Monitor attack frequency and severity and overall treatment response under specialist follow-up.

Counselling the patient

  • Explain that this medicine is taken regularly to prevent angioedema attacks, not to treat one that has started.
  • Stress that on-demand rescue treatment must always be available.
  • Advise reporting any unusual bleeding or bruising.

Evidence & guidelines

Garadacimab is a factor XIIa inhibitor developed for long-term prophylaxis of hereditary angioedema attacks.

Reference: NICE TA1041; SmPC; 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.