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PubMed This is a summary of 18 peer-reviewed journal articles Updated
Immunology

Navigating Medical Care and Emergencies

At a Glance

Managing Hereditary Angioedema Type 1 requires an active emergency plan. Standard allergy treatments like EpiPens do not work for HAE. Patients must carry specialized on-demand medication, an ER letter, and seek immediate hospital care for any throat swelling.

Living well with Hereditary Angioedema (HAE) Type 1 requires moving from being a passive patient to an active, “emergency-ready” manager of your health. Because HAE is rare and standard emergency treatments (like EpiPens) do not work, your safety depends on having a clear plan and a team that understands the specific biology of your condition [1][2].

Building Your Care Team

You should ideally be managed by an immunologist or allergist with specific experience in rare diseases [3]. A high-quality HAE specialist will:

  • Provide an ER Letter: This is a formal document for ER staff explaining that your condition is bradykinin-mediated and requires HAE-specific drugs [4]. (Organizations like the HAEA provide excellent templates for these letters).
  • Offer Comprehensive Care: They should provide access to all modern therapies, including both on-demand and long-term prophylaxis [5][6].
  • Coordinate Family Screening: Since HAE is genetic, your specialist should help organize testing for your parents, siblings, and children [7][8].

The Gold Standard: Self-Administration

International guidelines strongly recommend that all patients be trained to self-administer their medications (either by under-the-skin injection or IV) [9][10].

  • Speed is Safety: The faster you treat an attack, the shorter and less severe it will be. Self-treating at home is almost always faster than traveling to a hospital [1].
  • Peace of Mind: Knowing you have the tools to stop an attack yourself significantly reduces “attack anxiety”—the constant worry about where the nearest knowledgeable doctor is [9][11].

Your Emergency Action Plan (EAP)

Every HAE patient needs a written Emergency Action Plan. This is a step-by-step guide for what to do during a crisis, especially a laryngeal (throat) attack.

  1. Immediate Treatment: At the very first sign of throat tightness or a change in voice, administer your on-demand medication immediately [1][12].
  2. Emergency Room Visit: A throat attack is an absolute medical emergency. Call 911 or go to the nearest Emergency Room immediately, even after you have administered your rescue medication. Airway swelling can sometimes dangerously progress or rebound even after initial treatment [1][13].
  3. Communication: Carry an HAE Medical ID card in your wallet and ensure your phone’s “Medical ID” feature is updated with your diagnosis and rescue medication names [4].

Travel and Daily Readiness

  • Always Carry Medication: Never leave home without your rescue medication. When traveling, always pack your medication in your carry-on luggage, never in your checked bags, to avoid it being lost or exposed to extreme temperatures.
  • Keep Your ER Letter On Hand: Ensure you have multiple copies of your ER letter available in your car, your bag, and with close family members.

Long-Term Survivorship and Wellbeing

Managing HAE is about more than just physical swelling; it is about the psychological burden of living with an unpredictable condition [14].

  • Routine Monitoring: You should see your specialist every 6–12 months to review your “attack logs” and ensure your treatment is working [6]. If you are on certain medications, your doctor may perform routine blood work to monitor liver or kidney function [15][16].
  • Managing Anxiety: It is normal to feel “anticipatory anxiety” about the next attack [14]. Modern guidelines state that the best way to manage this is through disease control—reaching a state where you have zero or near-zero attacks through effective prophylaxis [17][18]. If HAE is still limiting your life or mental health, speak to your doctor about adjusting your preventative regimen.

Common questions in this guide

What should I do if I have a throat attack with HAE?
At the first sign of throat tightness or voice change, administer your on-demand HAE medication immediately. Then, call 911 or go to the nearest emergency room, as airway swelling is a life-threatening medical emergency.
Why do I need an ER letter for HAE Type 1?
Standard emergency treatments like EpiPens do not work for HAE because the swelling is bradykinin-mediated, not allergic. An ER letter explains your specific rare disease to hospital staff and lists the exact medications needed to stop an attack.
Should I learn how to self-administer my HAE medication?
Yes, international guidelines strongly recommend self-administration. Treating an attack quickly at home is usually faster than traveling to a hospital, which helps stop the swelling sooner and reduces anxiety.
How should I travel with my HAE medication?
Always pack your HAE rescue medication in your carry-on luggage, never in checked bags. This ensures your medicine is not lost in transit and protects it from extreme temperature changes in the cargo hold.
How can I manage the anxiety of having unpredictable HAE attacks?
Anticipatory anxiety is common with HAE. The most effective way to reduce this fear is by achieving better disease control through preventative therapies (prophylaxis) that can bring your attack rate to near zero.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Do you have a pre-written 'ER Letter' I can carry that explains HAE Type 1 and lists the specific medications that do and do not work for me?
  2. 2.Can we schedule a dedicated training session for me and my partner to practice self-administering my on-demand treatment?
  3. 3.How often should we meet to review my 'Action Plan' and ensure my medication dosages are still optimal?
  4. 4.If I have a laryngeal attack and use my rescue medication at home, what are the specific criteria for when I still need to go to the Emergency Room?
  5. 5.Can you recommend a therapist or support group familiar with the psychological impact of living with a rare, unpredictable condition?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (18)
  1. 1

    Breakthrough attacks in patients with hereditary angioedema receiving long-term prophylaxis are responsive to icatibant: findings from the Icatibant Outcome Survey.

    Aberer W, Maurer M, Bouillet L, et al.

    Allergy, asthma, and clinical immunology : official journal of the Canadian Society of Allergy and Clinical Immunology 2017; (13()):31 doi:10.1186/s13223-017-0203-z.

    PMID: 28690642
  2. 2

    Current and Emerging Therapeutics in Hereditary Angioedema.

    Do T, Riedl MA

    Immunology and allergy clinics of North America 2024; (44(3)):561-576 doi:10.1016/j.iac.2024.03.009.

    PMID: 38937016
  3. 3

    Therapeutic management of hereditary angioedema: past, present, and future.

    Valerieva A, Nedeva D, Yordanova V, et al.

    Balkan medical journal 2021; (38(2)):89-103 doi:10.5152/balkanmedj.2021.21094.

    PMID: 33724190
  4. 4

    The importance of recognizing and managing a rare form of angioedema: hereditary angioedema due to C1-inhibitor deficiency.

    Jacobs J, Neeno T

    Postgraduate medicine 2021; (133(6)):639-650 doi:10.1080/00325481.2021.1905364.

    PMID: 33993830
  5. 5

    Recognition and Management of Hereditary Angioedema: Best Practices for Dermatologists.

    Manning ME

    Dermatology and therapy 2021; (11(5)):1829-1838 doi:10.1007/s13555-021-00593-x.

    PMID: 34460082
  6. 6

    Patient Preferences for Long-Term Prophylactic Treatment in Hereditary Angioedema: A Discrete-Choice Experiment.

    Villa KF, Mansfield C, Yarlas A, et al.

    The patient 2026; (19(3)):481-495 doi:10.1007/s40271-025-00798-8.

    PMID: 41565919
  7. 7

    Malignancy and immune disorders in patients with hereditary angioedema.

    Stepaniuk P, Kanani A

    Allergy, asthma, and clinical immunology : official journal of the Canadian Society of Allergy and Clinical Immunology 2021; (17(1)):134 doi:10.1186/s13223-021-00621-7.

    PMID: 34924008
  8. 8

    Hereditary angioedema in a single family with specific mutations in both plasminogen and SERPING1 genes.

    Bork K, Zibat A, Ferrari DM, et al.

    Journal der Deutschen Dermatologischen Gesellschaft = Journal of the German Society of Dermatology : JDDG 2020; (18(3)):215-223 doi:10.1111/ddg.14036.

    PMID: 32065705
  9. 9

    Hereditary angioedema: an update on causes, manifestations and treatment.

    Longhurst HJ, Bork K

    British journal of hospital medicine (London, England : 2005) 2019; (80(7)):391-398 doi:10.12968/hmed.2019.80.7.391.

    PMID: 31283393
  10. 10

    Current medical management of hereditary angioedema: Follow-up survey of US physicians.

    Riedl MA, Banerji A, Gower R

    Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology 2021; (126(3)):264-272 doi:10.1016/j.anai.2020.10.009.

    PMID: 33122123
  11. 11

    High attack frequency in patients with angioedema due to C1-inhibitor deficiency is a major determinant in switching to home therapy: a real-life observational study.

    Squeglia V, Barbarino A, Bova M, et al.

    Orphanet journal of rare diseases 2016; (11(1)):133 doi:10.1186/s13023-016-0518-8.

    PMID: 27686124
  12. 12

    Expert Consensus on the Diagnosis and Treatment of Hereditary Angioedema in China (2024 Edition).

    Xu Y, Liu S, Wang X, et al.

    International archives of allergy and immunology 2026; (187(1)):61-73 doi:10.1159/000545808.

    PMID: 40209692
  13. 13

    Emerging drugs for the treatment of hereditary angioedema due to C1-inhibitor deficiency.

    Zanichelli A, Montinaro V, Triggiani M, et al.

    Expert opinion on emerging drugs 2022; (27(2)):103-110 doi:10.1080/14728214.2022.2105834.

    PMID: 35876094
  14. 14

    Can depression and anxiety be predicted in hereditary angioedema? A comprehensive assessment.

    Akten HS, Dilek E, Orman M, Mete Gokmen EN

    Allergy and asthma proceedings 2025; (46(3)):e71-e81 doi:10.2500/aap.2025.46.250017.

    PMID: 40380370
  15. 15

    Oral berotralstat for the prophylaxis of hereditary angioedema attacks in patients in Japan: A phase 3 randomized trial.

    Ohsawa I, Honda D, Suzuki Y, et al.

    Allergy 2021; (76(6)):1789-1799 doi:10.1111/all.14670.

    PMID: 33247955
  16. 16

    Lanadelumab to treat hereditary angioedema.

    Wedi B

    Drugs of today (Barcelona, Spain : 1998) 2019; (55(7)):439-448 doi:10.1358/dot.2019.55.7.2985293.

    PMID: 31347612
  17. 17

    Treatment Patterns and Characteristics of Patients with Hereditary Angioedema Treated with Lanadelumab: A US Retrospective Chart Review.

    Watt M, Chang R, Yu LH, et al.

    Drugs - real world outcomes 2025; (12(3)):351-365 doi:10.1007/s40801-025-00505-x.

    PMID: 40665203
  18. 18

    Garadacimab for hereditary angioedema attack prevention: long-term efficacy, quality of life, and safety data from a phase 2, randomised, open-label extension study.

    Craig TJ, Levy DS, Reshef A, et al.

    The Lancet. Haematology 2024; (11(6)):e436-e447 doi:10.1016/S2352-3026(24)00081-4.

    PMID: 38710185

This guide to managing HAE Type 1 emergencies is for educational purposes only. Always consult your immunologist or allergist to develop a personalized emergency action plan.

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