Brand name · C1 esterase inhibitor recombinant
Ruconest: adverse event reports filed with FDA
5,625 reports list it as a suspect or interacting product, 2015–2026.
- 5,625
- reports as suspect product
- 0% of all reports · about 508 a year
- 793
- reports, 12 months to June 2026
- 930 in the 12 months before
- 28.5%
- marked serious by the reporter
- 57.4% across all reports
- 0.3%
- record death among outcomes, as reported
- 18 reports · not verified by FDA
5,625 adverse event reports received by FDA list the brand name Ruconest (C1 esterase inhibitor recombinant) as a suspect or interacting product, from June 2015 to June 2026. A further 609 reports list it only as a concomitant medication, and those are not counted in the figures on this page.
In the 12 months to June 2026, 793 reports listed it, down 15% from 930 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Over its reporting history that is about 508 reports a year and 0% of the 20,646,523 reports in the database. How many people take it is not in the data, so a count is not a rate of occurrence.
The MedDRA terms listed most often are intentional product use issue (13.5%), hereditary angioedema (10.9%) and drug ineffective for unapproved indication (9%). A report can list several reactions, so shares add to more than 100%; 397 different terms appear across these reports. Intentional product use issue is recorded in 13.5% of these reports, against 0.4% of all reports in the database.
28.5% of the reports are marked serious by the reporter; 0.3% record death among the outcomes and 18.4% record hospitalisation, as reported. 86.6% of the reports came from consumers, and the largest patient age group is 18 to 44 (2.6%). 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
Reports by the month FDA received them. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.
By year received
2026 covers reports received through June 2026 only.
Reactions recorded in the reports
share of Ruconest reports recording the termall reports in the database
- Intentional product use issuedeliberate use not as intended13.5%760
- Hereditary angioedema10.9%615
- Condition aggravatedthe condition being treated got worse7.4%418
- Product use in unapproved indicationused for a purpose not on the label7.1%397
- Drug ineffectivethe medicine did not work as expected7%395
- Pharyngeal swelling6.3%354
- Vascular access site complication3.4%190
- Underdoseless than the intended dose2.8%156
- Weight fluctuation2.7%151
- Maternal exposure during pregnancythe mother took the medicine during pregnancy2.6%145
- Product dose omission issuea dose was missed2.6%145
- Weight decreasedweight loss2.5%139
- Weight increasedweight gain2.3%130
- Covid-19COVID-19 infection2.1%120
- Headachehead pain2.1%118
- Stressstress1.9%109
- Nauseafeeling sick1.8%103
- Malaisegeneral feeling of being unwell1.8%101
- Dyspnoeashortness of breath1.6%91
- Sinusitissinus infection1.4%79
- Insurance issue1.4%78
- Illness1.3%74
- Painpain, site not specified1.3%74
- Pneumonialung infection1.3%74
- Off label useused for a purpose or in a way not on the label1.3%73
- Drug effect incomplete1.3%71
- Vomitingbeing sick1.2%70
- Fatiguetiredness1.2%66
- Diarrhoealoose or frequent stools1.1%64
Top 30 of 397 MedDRA preferred terms recorded across these reports, with a plain-language gloss where one is available. One report can record several terms. The hollow bar is the share of all reports in the database; it describes the reports, not the patients. 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."
Outcomes recorded
Outcome flags as the reporter set them; a report can carry several, and "other serious" is FDA's own category for serious reports outside the named outcomes. Grey bar: all 20,646,523 reports. FDA has not verified any outcome and states that the reports "cannot be used to estimate the incidence of these events."
Patients and reporters
Patient age
Patient sex
Who reported
Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 99.4% of reports give the United States as the country of the event or reporter.
Reason for use recorded
| Indication as recorded (MedDRA) | Reports | Share |
|---|---|---|
| Hereditary angioedema | 4,903 | 87.2% |
| Hereditary angioedema with normal c1 esterase inhibitor | 79 | 1.4% |
| Hereditary angioedema with c1 esterase inhibitor deficiency | 59 | 1% |
| Prophylaxis | 43 | 0.8% |
| Angioedema | 26 | 0.5% |
| Complement deficiency disease | 21 | 0.4% |
The indication field is filled in by the reporter and is often blank; shares are of all 5,625 reports.
Drugs most often listed in the same reports
| Drug (any role in the report) | Reports | Share of Ruconest reports |
|---|---|---|
| Epinephrine | 2,390 | 42.5% |
| Takhzyro | 1,021 | 18.2% |
| Heparin | 842 | 15% |
| Firazyr | 638 | 11.3% |
| Haegarda | 610 | 10.8% |
| Ergocalciferol | 560 | 10% |
| Sodium chloride | 421 | 7.5% |
| Albuterol sulfate | 405 | 7.2% |
| Gabapentin | 405 | 7.2% |
| Sterile water | 403 | 7.2% |
Other products listed in reports where Ruconest is a suspect product, whatever their own role. Co-listing means the two were recorded together; it says nothing about either product's part in the event. Only the 2,500 most-reported names are counted here.
In context
| Measure | Ruconest | All reports |
|---|---|---|
| Reports as suspect product | 5,625 | 20,646,523 |
| Share of that pool | — | 0% |
| Reports, latest 12 months | 793 | 1,332,454 |
| Marked serious | 28.5% | 57.4% |
| Death recorded among outcomes, per 1,000 reports | 3 | 91 |
| Hospitalisation recorded, per 1,000 reports | 184 | 213 |
| Consumer-filed share | 86.6% | 45.8% |
| Top term, share of reports | Intentional product use issue 13.5% | 0.4% |
Shares are of reports, not of patients treated. The number of people taking a product is not in the data, so none of these figures is a rate, and differences between columns reflect who takes a product, who reports and how long it has been sold. 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."
Questions about Ruconest reports
How many adverse event reports has FDA received for Ruconest?
5,625 reports list Ruconest as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 793 of them arrived in the latest 12 months. Another 609 list it only as a concomitant medication.
What reactions are recorded in Ruconest reports?
intentional product use issue (13.5%), hereditary angioedema (10.9%), drug ineffective for unapproved indication (9%), condition aggravated (7.4%) and product use in unapproved indication (7.1%). These are MedDRA preferred terms coded from what the reporter described; a report can list several, and a term's presence is not a finding that Ruconest was responsible.
How serious are the reports?
28.5% are marked serious by the reporter. Among the outcomes recorded, 0.3% of reports include death and 18.4% include hospitalisation. FDA has not verified these outcomes and states that the reports "cannot be used to estimate the incidence" of the events.
Who files these reports?
consumer or non-health professional (86.6%), physician (7.5%) and other health professional (5.3%). Most reports reach FDA through the manufacturer, which must forward reports it receives.
Are reports for Ruconest rising?
793 reports in the 12 months to June 2026, down 15% from 930 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Counts also move with how many people take a product, its time on the market and publicity.
Do these reports show that Ruconest was responsible for these reactions?
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." The reaction may relate to the condition being treated, to other medicines, or to something else.
Is this a list of the side effects of Ruconest?
No. It is a count of what was reported to FDA. The adverse reactions observed in clinical studies are printed on the FDA-approved label, which a pharmacist or clinician can go through with you.
How do I report an adverse event?
Consumers and health professionals can report to FDA through MedWatch (Form FDA 3500 online, or 1-800-FDA-1088), or to the manufacturer, which must pass reports on. See the guide on how to report.
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. A report counts here when it lists Ruconest as a suspect or interacting product; reports listing it only as a concomitant medication (609) are excluded. 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.