What Is AERD and How Does It Affect Your Sinuses and Smell?

Aspirin-Exacerbated Respiratory Disease (AERD), also known as Samter’s Triad, is a complex chronic medical syndrome defined by three features: asthma, chronic rhinosinusitis with nasal polyps, and respiratory hypersensitivity to aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen ^[1]. When someone with AERD takes an NSAID, it can trigger rapid nasal congestion, a runny nose, wheezing, or a severe asthma flare ^[2].

Important Safety and Avoidance Guidelines

If you have or strongly suspect you have AERD, you must avoid all traditional COX-1 NSAIDs (such as aspirin, ibuprofen, and naproxen) unless you are actively undergoing a specialist-managed desensitization program ^[1].

• Read labels: Check all over-the-counter pain, cold, and combination products, as many contain hidden NSAIDs. Inform every doctor and pharmacist about your condition.
• Never test yourself: Do not take a suspected medicine at home to “see if you react.”
• Emergency Plan: If you accidentally take an NSAID and develop severe wheezing, chest tightness, or rapidly worsening breathing, follow your prescribed asthma action plan and seek emergency medical care immediately.
• Alternative pain relief: Acetaminophen is often tolerated at normal doses, though it can cause reactions in some patients at higher doses ^[2]. Selective COX-2 inhibitors (like celecoxib) are generally tolerated but require individualized clinical guidance ^[2]. Discuss alternatives with your clinician before taking them.

How AERD Affects the Sinuses

While AERD is a condition affecting the entire respiratory system, it frequently involves severe chronic ethmoidal sinusitis ^[3]. The chronic inflammation drives the aggressive growth of nasal polyps (swollen inflammatory tissue in the nasal passages).

Patients with AERD often experience intense nasal obstruction and a profound loss of smell (anosmia) ^[4][5]. Even after polyps are surgically removed, they tend to recur more frequently in patients with AERD than in those with standard sinus disease ^[6][4]. Living with persistent congestion, smell loss, and medication restrictions can be exhausting, but with a dedicated long-term care plan, these symptoms are manageable.

The Biological Link: Asthma, Polyps, and NSAIDs

AERD is not a traditional IgE-mediated drug allergy ^[1]. Instead, the reaction involves an underlying imbalance in how the body processes inflammatory chemicals called eicosanoids.

In AERD, the airways typically feature an overactive Type-2 inflammation pathway driven by eosinophils (a type of white blood cell) and immune cells called mast cells ^[7]. The body produces an excess of cysteinyl leukotrienes (chemicals that promote airway swelling and mucus) while having lower levels of a protective, anti-inflammatory chemical called PGE2 ^[8][9].

Aspirin and traditional NSAIDs block an enzyme called COX-1. In a person with AERD, blocking COX-1 alters eicosanoid signaling further, which often triggers mast-cell activation and a surge of leukotrienes ^[8][10]. This surge is what causes rapid, severe airway narrowing and nasal swelling ^[2].

Diagnosis

Because asthma and nasal polyps can occur without NSAID sensitivity, having both does not automatically mean you have AERD. Diagnosis is usually based on a clear history of respiratory reactions to NSAIDs alongside asthma and nasal polyps ^[1]. If your medication history is unclear, an allergist or immunologist may perform an in-office, specialist-supervised aspirin challenge ^[1]. This must never be attempted at home.

Managing and Treating AERD

Because AERD involves both the upper and lower airways, management requires a coordinated approach, often involving ENTs, allergists, and pulmonologists. There is no single cure, but various treatments can be layered to control the disease.

• Baseline Therapies: The foundation of care involves daily management: ongoing asthma controller medications, saline sinus rinses, and topical intranasal corticosteroids ^[11]. Avoidance of culprit drugs remains crucial.
• Endoscopic Sinus Surgery (ESS): When baseline therapies aren’t enough, surgery may be recommended to remove polyps and open the sinuses (including the ethmoids) ^[11]. This improves airflow and helps topical steroid sprays reach inflamed tissue ^[12]. However, surgery does not cure the underlying inflammation, and polyps can return.
• Aspirin Desensitization: Often following surgery, a specialist may slowly introduce aspirin in a strictly monitored clinical setting until tolerance is built ^[11]. Afterward, you must take a high daily maintenance dose of aspirin to maintain the tolerance, which can reduce polyp regrowth and asthma severity ^[13]. Crucially, this protection is temporary. If you miss doses, you can lose the desensitization and must contact your medical team before restarting, as a repeat desensitization may be needed. Risks of long-term high-dose aspirin include gastrointestinal bleeding, ulcers, bruising, and tinnitus ^[13].
• Biologic Medications: For patients who cannot tolerate high-dose aspirin or whose symptoms remain poorly controlled, biologic injections (such as dupilumab) block specific inflammatory pathways like IL-4 receptor-alpha ^[14]. They can shrink polyps, restore smell, and reduce the need for oral steroids or repeat surgeries, though individual benefits, side effects, and access vary ^[15].
• Leukotriene Modifiers: Medications like montelukast block leukotriene receptors and are often used as an add-on therapy ^[11]. Note: Montelukast carries an FDA boxed warning for potential serious neuropsychiatric side effects, such as mood or behavior changes. Always discuss this risk with your prescriber and report any concerning symptoms immediately.