MedDRA preferred term

Hereditary angioedema: adverse event reports recording this term

10,362 reports to FDA record it, 2005–2026; 0.1% of the database.

Read first · FDA's statement on these data

Adverse event reports submitted to FDA do not undergo extensive validation or verification. Therefore, a causal relationship cannot be established between product and reactions listed in a report. While a suspected relationship may exist, it is not medically validated and should not be the sole source of information for clinical decision making or other assumptions about the safety or efficacy of a product. Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product. openFDA, FDA

FDA adds: "There is no certainty that the reported event (adverse event or medication error) was actually due to the product. FDA does not require that a causal relationship between a product and event be proven, and reports do not always contain enough detail to properly evaluate an event." The information in these reports "cannot be used to estimate the incidence of these events."

Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated.

Not medical advice. This site counts what was reported to FDA. Questions about a medicine or device belong with a pharmacist or clinician.

10,362
reports recording the term: 0.1% of all reports; 1,088
reports, 12 months to June 2026: 988 in the 12 months before; 83.8%
marked serious by the reporter: 57.4% across all reports; 1%
record death among outcomes, as reported: 9.1% across all reports

10,362 reports in FDA's adverse event database record the MedDRA term "Hereditary angioedema": 0.1% of all reports received between March 2005 and June 2026. Coders pick the term that best matches the reporter's description.

1,088 reports recorded it in the 12 months to June 2026, up 10% from 988 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Of reports recording this term, 83.8% are marked serious, 1% include death among the outcomes and 36.8% include hospitalisation, as reported.

The drugs listed most often as suspect products in those reports are Haegarda, Firazyr and Lanadelumab. That order mostly follows how many reports each drug has overall; the table also gives the term's share within each drug's own reports. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

Reports by month, five years

FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.

Drugs listed as suspect products in these reports

Drug	Class	Reports with this term	Share of the drug's own reports
Haegarda	—	2,936	61.6%
Firazyr	Bradykinin B2 receptor antagonist	1,446	47.8%
Lanadelumab	—	1,389	64%
Cinryze	Human C1 esterase inhibitor	1,347	50.7%
Berinert	—	1,286	27.3%
Takhzyro	Plasma kallikrein inhibitor	881	51.6%
Icatibant	Bradykinin B2 receptor antagonist	651	33.5%
Ruconest	—	615	10.9%
Kalbitor	Plasma kallikrein inhibitor	567	40.8%
Human c1-esterase inhibitor	Human C1 esterase inhibitor	351	52.5%
Andembry	—	238	71.7%
Sajazir	Bradykinin B2 receptor antagonist	179	48.8%
Orladeyo	Plasma kallikrein inhibitor	143	21.2%
Dawnzera	—	128	42.4%
Icatibant acetate	Bradykinin B2 receptor antagonist	112	17.2%
Ekterly	Plasma kallikrein inhibitor	64	22%
Xolair	Anti-IgE	44	0.1%
Dupixent	Interleukin-4 receptor alpha antagonist	43	0%
Covid-19 Vaccine	—	28	0.7%
Clonazepam	Benzodiazepine	23	0.1%
Diazepam	Benzodiazepine	23	0.1%
Human immunoglobulin g	Human immunoglobulin G	23	0.1%
Ibuprofen	Nonsteroidal anti-inflammatory drug	19	0%
Methotrexate	Folate analog metabolic inhibitor	18	0%
Omalizumab	Anti-IgE	17	0.2%

Drugs with a page on this site, ordered by the number of their reports recording this term. The last column is the term's share within that drug's own reports, against 0.1% across the whole database. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

By pharmacologic class

Class	Reports with this term	Share of class reports	Median drug in class
Bradykinin B2 receptor antagonist	2,209	39.3%	33.5%
Human C1 esterase inhibitor	1,698	51%	51.6%
Plasma kallikrein inhibitor	1,591	42.2%	40.8%
Anti-IgE	74	0.1%	0.2%
Benzodiazepine	48	0%	0%
Interleukin-4 receptor alpha antagonist	43	0%	0%
Human immunoglobulin G	32	0%	0%
Tumor necrosis factor blocker	31	0%	0%
Angiotensin converting enzyme inhibitor	26	0%	0%
Nonsteroidal anti-inflammatory drug	23	0%	0%

Classes ordered by count. Class shares follow the class's overall report volume as much as anything else.

Patients in these reports

Patient age

Under 20%2

2 to 111.3%132

12 to 172.9%301

18 to 4434.5%3,572

45 to 6423.4%2,428

65 to 745.3%552

75 and over2.7%276

Age not given29.9%3,099

Patient sex

Female68.8%7,131

Male18.5%1,920

Not given12.7%1,311

Grey bar: all 20,646,523 reports in the database. 87.6% of these reports give the United States as the country.

Questions about "Hereditary angioedema"

What does "Hereditary angioedema" mean in an adverse event report?

It is a MedDRA preferred term, the dictionary FDA uses to code what a reporter described. The report's own description is not published by openFDA and is not shown here.

How many reports record hereditary angioedema?

10,362 reports through June 2026 (0.1% of all reports), 1,088 of them in the latest 12 months.

Which drugs appear most often in these reports?

Haegarda (2,936), Firazyr (1,446), Lanadelumab (1,389), Cinryze (1,347) and Berinert (1,286). Drugs with many reports overall lead almost every term's list. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

Does a drug appearing here mean it was responsible for this reaction?

No. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

I have this symptom. What should I do?

This site cannot assess anyone. A pharmacist or clinician can; for an emergency, call the local emergency number. Nothing on this page is medical advice.

Where this comes from. Counts are built from the openFDA Drug Adverse Event (FAERS) bulk export released 28 Sep 2026, which holds reports FDA received through 30 Jun 2026. Drug names are as reported, resolved to the brand or generic name on the FDA label where openFDA's harmonisation matched them; classes are the pharmacologic class (EPC) from the label and the National Drug Code Directory of 17 Sep 2026. Terms are pooled across spelling and capitalisation variants of one MedDRA preferred term. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.