New RNA drug aims to stop debilitating swelling attacks in rare genetic condition
NCT ID NCT06960213
First seen Jun 27, 2026 · Last updated Sep 11, 2026 · Updated 2 times
Summary
This phase 3 trial is testing an experimental drug called ADX-324 in 90 adults with hereditary angioedema (HAE) types 1 or 2. HAE causes sudden, painful swelling in the body. ADX-324 uses a technology called siRNA to lower levels of a protein involved in triggering these attacks. The study compares two doses of ADX-324 against a placebo to see if it can reduce the number of swelling attacks over time.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- ADX-324 (a type of RNA drug called siRNA that targets a protein involved in swelling attacks)
- What this could lead to
- If successful, ADX-324 could offer a new way to prevent painful and dangerous swelling attacks in people with hereditary angioedema, reducing attack frequency and improving quality of life.
- What could go wrong
- This is a phase 3 trial, but it's still relatively small (90 participants). The drug may not work better than placebo, or side effects could emerge. Long-term safety and effectiveness are not yet known.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
-
About 90 people
The number the study aims to enrol. It can still change while the study runs.
- Started
-
Aug 2025
- Expected to finish
-
Dec 2027
An estimate. End dates often move.
- Lead sponsor
-
A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 years and older
- Sex
-
Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Key Inclusion Criteria: * Age ≥18 years at the time of signing informed consent. * Have a documented diagnosis of HAE-1/HAE-2 (Type I or II) * Experience ≥1 Investigator-confirmed HAE attack in the first 4 weeks of Screening or ≥2 Investigator-confirmed HAE attacks in 8 weeks of Screening * Able to use at least one acute therapy to treat HAE attacks (such as a plasma-derived or recombinant C1-INH concentrate or a BK2-receptor antagonist) Key Exclusion Criteria: * Concurrent diagnosis of another form of recurrent angioedema (such as acquired angioedema, HAE with normal C1-INH (previously known as HAE Type III), idiopathic angioedema, or recurrent angioedema associated with urticaria). * Any clinically significant renal disease * Any clinically significant hepatic disease * Have used any of the following for long-term prevention of HAE attacks: 1. C1-INH agent (CINRYZE, HAEGARDA, RUCONEST) within 2 weeks prior to Screening. 2. Berotralstat (ORLADEYO) within 3 weeks prior to Screening. 3. Lanadelumab (TAKHZYRO) within 8 weeks prior to the Screening. 4. Androgen use within 12 weeks prior to Screening. * Received prior treatment with any RNA/DNA-based therapy for HAE or intolerant to any prior RNA/DNA-based therapy for any condition, excluding vaccines.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for HAE are added.
Genom att skicka in godkänner du våra Användarvillkor
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
-
The study's own enquiry address
This study publishes an address for enquiries. See it below .
-
The places running it
66 sites in 24 countries. The list below names each one and where it is.
-
The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
-
A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Show contact details
Enter your email to view the contact information for this study.
Genom att skicka in godkänner du våra Användarvillkor
Study contacts
-
Contact
Email: •••••@•••••
Locations
-
ADARx Clinical Site
RECRUITINGLitchfield Park, Arizona, 85340, United States
-
ADARx Clinical Site
RECRUITINGScottsdale, Arizona, 85251, United States
-
ADARx Clinical Site
RECRUITINGLittle Rock, Arkansas, 72205, United States
-
ADARx Clinical Site
RECRUITINGSan Diego, California, 92122, United States
-
ADARx Clinical Site
NOT_YET_RECRUITINGSanta Monica, California, 90404, United States
-
ADARx Clinical Site
RECRUITINGWalnut Creek, California, 94598, United States
-
ADARx Clinical Site
RECRUITINGCentennial, Colorado, 80112, United States
-
ADARx Clinical Site
RECRUITINGOrlando, Florida, 32807, United States
-
ADARx Clinical Site
RECRUITINGChevy Chase, Maryland, 20815, United States
-
ADARx Clinical Site
WITHDRAWNWheaton, Maryland, 20902, United States
-
ADARx Clinical Site
RECRUITINGDetroit, Michigan, 48202, United States
-
ADARx Clinical Site
RECRUITINGSt Louis, Missouri, 63141, United States
-
ADARx Clinical Site
RECRUITINGLas Vegas, Nevada, 89128, United States
-
ADARx Clinical Site
RECRUITINGNew York, New York, 10029, United States
-
ADARx Clinical Site
RECRUITINGCincinnati, Ohio, 45236, United States
-
ADARx Clinical Site
NOT_YET_RECRUITINGCleveland, Ohio, 44195, United States
-
ADARx Clinical Site
WITHDRAWNColumbus, Ohio, 43235, United States
-
ADARx Clinical Site
RECRUITINGToledo, Ohio, 43617, United States
-
ADARx Clinical Site
RECRUITINGHershey, Pennsylvania, 17033, United States
-
ADARx Clinical Site
RECRUITINGCapital Federal, Buenos Aires, C1425BEN, Argentina
-
ADARx Clinical Site
RECRUITINGBuenos Aires, Buenos Aires F.D., C1035AAT, Argentina
-
ADARx Clinical Site
RECRUITINGPilar, 1629, Argentina
-
ADARx Clinical Site
RECRUITINGRosario, 2000, Argentina
-
ADARx Clinical Site
NOT_YET_RECRUITINGCampbelltown, New South Wales, 2560, Australia
-
ADARx Clinical Site
RECRUITINGAdelaide, South Australia, 5000, Australia
-
ADARx Clinical Site
RECRUITINGVienna, 1090, Austria
-
ADARx Clinical Site
RECRUITINGEdegem, Antwerpen, 2650, Belgium
-
ADARx Clinical Site
NOT_YET_RECRUITINGCampinas, 13073-002, Brazil
-
ADARx Clinical Site
NOT_YET_RECRUITINGSão Paulo, 01246-903, Brazil
-
ADARx Clinical Site
RECRUITINGSofia, 1000, Bulgaria
-
ADARx Clinical Site
WITHDRAWNEdmonton, Alberta, T6G 2R3, Canada
-
ADARx Clinical Site
NOT_YET_RECRUITINGEdmonton, Alberta, T6G 2R3, Canada
-
ADARx Clinical Site
WITHDRAWNOttawa, Ontario, K1H 1E4, Canada
-
ADARx Clinical Site
RECRUITINGMontreal, Quebec, H2W 1R7, Canada
-
ADARx Clinical Site
RECRUITINGBeijing, 100730, China
-
ADARx Clinical Site
NOT_YET_RECRUITINGHarbin, 150001, China
-
ADARx Clinical Site
NOT_YET_RECRUITINGZhengzhou, 450003, China
-
ADARx Clinical Site
RECRUITINGSplit, 21000, Croatia
-
ADARx Clinical Site
RECRUITINGZagreb, 10000, Croatia
-
ADARx Clinical Site
RECRUITINGHradec Králové, 500 05, Czechia
-
ADARx Clinical Site
RECRUITINGPrague, 15000, Czechia
-
ADARx Clinical Site
RECRUITINGNice, Alpes-Maritimes, 06300, France
-
ADARx Clinical Site
RECRUITINGTours, Indre-et-Loire, 37000, France
-
ADARx Clinical Site
RECRUITINGGrenoble, 38043, France
-
ADARx Clinical Site
RECRUITINGMontpellier, 34295, France
-
ADARx Clinical Site
RECRUITINGParis, 75012, France
-
ADARx Clinical Site
RECRUITINGTübingen, Baden-Wurttemberg, 72076, Germany
-
ADARx Clinical Site
RECRUITINGHong Kong, 111, Hong Kong
-
ADARx Clinical Site
RECRUITINGBudapest, 1088, Hungary
-
ADARx Clinical Site
RECRUITINGRamat Gan, Tel Aviv, 5262100, Israel
-
ADARx Clinical Site
RECRUITINGAshkelon, 7830604, Israel
-
ADARx Clinical Site
RECRUITINGTel Aviv, 64239, Israel
-
ADARx Clinical Site
RECRUITINGPalermo, 90100, Italy
-
ADARx Clinical Site
RECRUITINGKrakow, Poland
-
ADARx Clinical Site
RECRUITINGLodz, 92-213, Poland
-
ADARx Clinical Site
RECRUITINGWroclaw, 50-556, Poland
-
ADARx Clinical Site
RECRUITINGBelgrade, 11000, Serbia
-
ADARx Clinical Site
NOT_YET_RECRUITINGMowbray, Capetown, 7700, South Africa
-
ADARx Clinical Site
RECRUITINGBarcelona, 08907, Spain
-
ADARx Clinical Site
RECRUITINGMadrid, 28007, Spain
-
ADARx Clinical Site
RECRUITINGTaichung, 40705, Taiwan
-
ADARx Clinical Site
NOT_YET_RECRUITINGAnkara, 06100, Turkey (Türkiye)
-
ADARx Clinical Site
NOT_YET_RECRUITINGBornova, 35100, Turkey (Türkiye)
-
ADARx Clinical Site
NOT_YET_RECRUITINGIstanbul, 34093, Turkey (Türkiye)
-
ADARx Clinical Site
NOT_YET_RECRUITINGKayseri, 38039, Turkey (Türkiye)
-
ADARx Clinical Site
NOT_YET_RECRUITINGGuildford, Surrey, GU2 7XX, United Kingdom
-
ADARx Clinical Site
RECRUITINGCambridge, CB2 0QQ, United Kingdom
-
ADARx Clinical Site
RECRUITINGCardiff, CF14 4YS, United Kingdom
-
ADARx Clinical Site
RECRUITINGLondon, E1 1BB, United Kingdom
-
ADARx Clinical Site
RECRUITINGSouthampton, SO16 6YD, United Kingdom
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Could a daily pill stop hereditary angioedema attacks?
- New oral option may offer relief for hereditary angioedema attacks
- Can a new injection tame hereditary swelling attacks?
- Could a simple pill shield HAE patients from Procedure-Triggered attacks?
- Teens with rare swelling disorder get new drug tested
- New drug shows promise for controlling rare swelling disorder