Immune

Hereditary Angioedema

Also known as HAE, C1 inhibitor deficiency, HAE-C1-INH, bradykinin-mediated angioedema

Hereditary angioedema causes recurrent episodes of swelling in the skin, abdomen, and airway. Types 1 and 2 are caused by SERPING1 mutations leading to C1-inhibitor deficiency.

ORPHA:528623 ↗Gene SERPING1 (HAE types 1 and 2)Gene F12 (HAE-FXII)Prevalence 1-9 per 100,000 (Orphanet)Onset All agesGenetic (autosomal dominant)

4

studies recruiting now

as of 7 Sept 2026

41

studies registered in total

as of 7 Sept 2026

26

countries with a recruiting site

as of 7 Sept 2026

4 Mar 2026

most recent study posted

among recruiting studies

Recruiting trials

Showing the 4 most recently updated recruiting studies, as recorded 7 Sept 2026. Live status on each study page.

Search all Hereditary Angioedema studies

Where recruiting studies are running

Countries with at least one recruiting site among the studies above, 7 Sept 2026. Tap a country to search trials there.

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Patient organisations

US Hereditary Angioedema AssociationPatient association
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Registry: US HAE Association Patient Registry · Join ↗. Registries connect patients to researchers and often hear about trials first.

About Hereditary Angioedema

Hereditary angioedema causes recurrent episodes of swelling in the skin, abdomen, and airway. Types 1 and 2 are caused by SERPING1 mutations leading to C1-inhibitor deficiency. This allows unchecked bradykinin production, causing plasma leakage and swelling. Laryngeal attacks can be life-threatening. Multiple approved therapies exist including C1-INH concentrate, icatibant, lanadelumab, and berotralstat. Trial activity is high for new long-acting and gene-based approaches.

Common clinical features

Laryngeal edemaTongue edemaEdema of the dorsum of handsUrticariaDermatographic urticariaAbdominal painLimbal edemaRecurrent angioedema

From Orphanet’s phenotype annotations (CC BY 4.0). Not a complete list.

Before you apply

Things trial teams commonly ask about for Hereditary Angioedema. Not eligibility rules; those are set by each study.

  • HAE type (1, 2, or FXII) must be confirmed with C1-INH level, C1-INH function, and C4 tests
  • Attack frequency (at least 3 attacks in 3 months is a common threshold) determines prophylaxis trial eligibility
  • Current prophylactic therapy (lanadelumab, berotralstat) history affects enrollment in comparison trials

Related conditions

Information, not medical advice. Trial listings are shown as recorded on ClinicalTrials.gov; whether any study is right for you is a decision for you and your clinicians, and eligibility is decided by each research team. Disease information from Orphanet (CC BY 4.0).