Aspirin-Exacerbated Respiratory Disease (AERD)
Asthma, nasal polyps, and reactions to aspirin and NSAIDs
Quick Facts
- Type: Chronic respiratory / inflammatory condition
- Core features: Asthma, nasal polyps, NSAID reactions
- Also called: Samter's triad
- Trigger to avoid: Aspirin and other NSAIDs
Overview
Aspirin-exacerbated respiratory disease (AERD) is a chronic condition defined by three features that occur together: asthma, recurring nasal polyps with chronic sinus inflammation, and reactions to aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs). Because of these three components it is often called Samter's triad.
AERD usually develops in adulthood in people who did not have aspirin sensitivity earlier in life. The underlying airway inflammation is present all the time, but taking aspirin or an NSAID can suddenly worsen breathing and nasal symptoms. Understanding the condition helps people avoid triggers and work with their care team on long-term control of both their breathing and nasal symptoms.
Symptoms
Symptoms come from two directions: ongoing airway and sinus inflammation, and acute reactions after taking aspirin or an NSAID.
- Persistent nasal congestion, runny nose, and reduced or lost sense of smell
- Recurring nasal polyps that often return after removal
- Asthma symptoms such as wheezing, coughing, chest tightness, and shortness of breath
- Facial pressure and frequent sinus infections
- Sudden worsening of breathing, nasal congestion, watery eyes, or flushing within minutes to a few hours of taking aspirin or an NSAID
A severe reaction with significant trouble breathing is a medical emergency and needs immediate care.
Causes
The exact cause of AERD is not fully understood, but it involves an abnormal handling of natural inflammatory chemicals in the airways. People with AERD overproduce substances called leukotrienes, which drive swelling and mucus in the nose, sinuses, and lungs.
Aspirin and other NSAIDs block an enzyme (COX-1) that normally helps keep these chemicals in balance. In someone with AERD, blocking that enzyme triggers a surge of leukotrienes, leading to a respiratory reaction. This is a pharmacologic reaction in the airway, not a classic allergy, even though the symptoms can feel similar.
Risk Factors
- Adult-onset asthma, especially when it is hard to control
- Chronic rhinosinusitis with nasal polyps
- A history of reacting to aspirin or NSAIDs with breathing or nasal symptoms
- Loss of sense of smell
- Repeated sinus surgeries with polyps that keep coming back
Diagnosis
AERD is usually suspected when a person has the combination of asthma, nasal polyps, and a history of reactions to aspirin or NSAIDs. Doctors confirm and assess it with:
- Medical history: Identifying the triad and past drug reactions.
- Nasal and sinus examination: Often including endoscopy and imaging to assess polyps and sinus inflammation.
- Aspirin challenge: A carefully supervised test in a specialized setting where small, increasing doses of aspirin are given to confirm the reaction. This should never be attempted at home.
Treatment
There is no single cure, but treatment can greatly improve symptoms and quality of life. Care usually combines several approaches:
- Avoiding NSAIDs: Strictly avoiding aspirin, ibuprofen, naproxen, and similar drugs unless a specialist has guided otherwise.
- Asthma and nasal medicines: Inhaled corticosteroids, nasal steroid sprays, and leukotriene-modifying medications to reduce inflammation.
- Biologic therapy: Targeted injectable medicines may be used for severe disease with polyps and asthma.
- Sinus surgery: Removing extensive polyps when they block the airway or sinuses.
- Aspirin desensitization: A specialist-supervised process that allows some people to take daily aspirin afterward, which can reduce polyp regrowth and symptoms.
Prevention
AERD itself cannot be prevented, but flare-ups can be reduced:
- Avoid aspirin and other NSAIDs unless your specialist advises otherwise; ask about acetaminophen as an alternative pain reliever
- Read medication labels carefully, as NSAIDs are in many over-the-counter products
- Keep asthma well controlled with prescribed inhalers
- Treat sinus inflammation consistently rather than only during flares
- Carry an action plan and rescue inhaler in case of a sudden reaction
When to See a Doctor
See a doctor if you have asthma along with recurring nasal polyps, loss of smell, or you have noticed breathing or nasal symptoms after taking aspirin or NSAIDs. A specialist (allergist or ENT) can confirm AERD and guide treatment.
Seek emergency care right away if you have severe shortness of breath, wheezing that does not respond to your rescue inhaler, swelling of the face or throat, or you feel faint after taking a medication.
Frequently Asked Questions
Is AERD an aspirin allergy?
Not in the classic sense. AERD is a pharmacologic reaction in the airway caused by how aspirin and NSAIDs affect inflammatory chemicals, not a typical antibody-driven allergy. The result can still be a serious breathing reaction, so these drugs must be avoided unless a specialist advises otherwise.
Can people with AERD take any pain relievers?
Acetaminophen is usually tolerated and is often recommended instead of NSAIDs. Always confirm safe options with your doctor, and avoid aspirin, ibuprofen, and naproxen unless you have been desensitized under medical supervision.
What is aspirin desensitization?
It is a specialist-supervised procedure in which gradually increasing doses of aspirin are given so the body can tolerate daily aspirin afterward. For many people this reduces nasal polyp regrowth and improves sinus and asthma symptoms. It must be done in a medical setting, never at home.
Do nasal polyps always come back in AERD?
Polyps in AERD tend to regrow even after surgery, which is one reason ongoing medical treatment is important. Aspirin desensitization and biologic medicines can slow regrowth and reduce how often surgery is needed.
Is AERD an emergency?
The chronic condition is managed over time, but a reaction after taking an NSAID can cause sudden severe breathing trouble. Seek emergency care immediately for severe shortness of breath, throat swelling, or wheezing that does not improve with a rescue inhaler.
References
- American Academy of Allergy, Asthma & Immunology (AAAAI). Aspirin-Exacerbated Respiratory Disease.
- Mayo Clinic. Nasal polyps and asthma.
- MedlinePlus, U.S. National Library of Medicine. Asthma.
- National Institute of Allergy and Infectious Diseases (NIAID). Asthma and allergic diseases.