Severe Asthma: When Inhalers and Steroids Are No Longer Enough

What Is Severe Asthma?

Asthma exists on a spectrum from mild-intermittent to severe. The Global Initiative for Asthma (GINA) defines severe asthma as asthma that requires high-dose inhaled corticosteroids (ICS) combined with a second controller medication — such as a long-acting beta-agonist (LABA) — to remain controlled, or that remains uncontrolled despite this regimen.

Within severe asthma, clinicians distinguish two key categories:

• Difficult-to-treat asthma: Asthma that appears uncontrolled due to factors such as incorrect inhaler technique, poor adherence, ongoing allergen exposure, or undiagnosed comorbidities (such as GERD or vocal cord dysfunction). With proper evaluation and support, many patients in this category can achieve better control.
• Truly refractory (severe uncontrolled) asthma: Asthma that remains poorly controlled even after all modifiable factors are addressed and optimal treatment has been in place for at least three to six months. These patients are the ones most likely to benefit from advanced therapies, including biologic medications.

Accurate classification matters. A thorough evaluation is the essential first step — not simply prescribing the next available medication.

Signs You May Have Severe Asthma

Severe asthma is often underdiagnosed because its symptoms overlap with common, less serious asthma. Key warning signs include:

• Asthma symptoms (cough, wheeze, chest tightness, shortness of breath) occurring most days or waking you at night despite using a high-dose inhaler
• Two or more asthma attacks (exacerbations) in the past 12 months requiring oral corticosteroids, an ER visit, or hospitalization
• Dependence on oral steroids (prednisone) to manage symptoms — whether as frequent short courses or continuous low-dose use
• Significant activity limitation: unable to exercise, climb stairs, or carry out normal daily tasks without triggering symptoms
• Lung function persistently below 80% of predicted despite maximum therapy
• Frequent rescue inhaler use (more than two days per week, not counting exercise-related use)

If you recognize two or more of these patterns, a specialist evaluation is strongly warranted. Consult your physician to discuss a referral or seek a severe asthma specialist directly.

Why Severe Asthma Is Different — The Biology Behind It

Standard asthma medications, particularly inhaled corticosteroids, work by broadly dampening airway inflammation. For mild to moderate asthma, this approach is usually sufficient. In severe asthma, however, the underlying inflammatory process is often more complex — driven by specific biological pathways that standard steroids do not adequately suppress.

Understanding your asthma's biological "type" — its endotype — is central to modern severe asthma management. The two main categories are:

• Type 2-High (T2) asthma: Driven by eosinophils, IgE antibodies, and cytokines such as IL-4, IL-5, and IL-13. This is the most common form of severe asthma. Patients often have allergies, elevated blood eosinophil counts, high FeNO readings, or nasal polyps. Type 2-High asthma responds well to biologic therapies that target specific parts of this pathway.
• Non-Type 2 asthma: Involves different inflammatory cells (such as neutrophils) and pathways. Fewer targeted therapies are currently available, but clinical research is advancing rapidly. Our clinic participates in studies developing the next generation of treatments for this group.

Knowing your endotype changes your treatment options. Learn more about the differences on our Asthma Types page.

How We Evaluate Severe Asthma at Advanced Asthma Clinic

Dr. Frank Hull has over 20 years of experience in pulmonary medicine and asthma research. His evaluation of severe asthma goes well beyond a standard office visit. A comprehensive severe asthma assessment at our Plantation, FL clinic typically includes:

• Detailed symptom and treatment history: Reviewing inhaler technique, medication adherence, trigger exposures, and prior responses to treatment
• Spirometry with bronchodilator response: Objective lung function measurement before and after a bronchodilator, providing baseline airflow data and reversibility assessment
• Fractional Exhaled Nitric Oxide (FeNO) testing: A non-invasive breath test that measures eosinophilic airway inflammation — a key biomarker for biologic candidacy
• Blood eosinophil count and IgE levels: Blood tests that help classify your asthma endotype and identify the most appropriate biologic therapy if indicated
• Allergy skin testing or allergen-specific IgE panels: To identify environmental triggers contributing to symptoms
• Comorbidity screening: Assessment for conditions that can mimic or worsen asthma, including GERD, chronic rhinosinusitis with nasal polyps, vocal cord dysfunction, and sleep apnea

This data-driven approach means that when a treatment decision is made, it is based on your specific biology — not a one-size-fits-all protocol.

Advanced Treatment Options for Severe Asthma

For patients with confirmed severe or refractory asthma, treatment options extend well beyond the standard inhaler regimen. At Advanced Asthma Clinic, we offer:

FDA-Approved Biologic Therapies

Biologics are precision medicines that target specific molecules in the inflammatory pathways driving your asthma. Rather than broadly suppressing the immune system (as steroids do), each biologic interrupts a specific step in the inflammatory cascade. Currently available biologics for severe asthma include agents targeting IgE (omalizumab), IL-5 and its receptor (mepolizumab, reslizumab, benralizumab), IL-4 and IL-13 (dupilumab), and TSLP (tezepelumab).

Clinical trials have shown that appropriate biologic therapy can reduce asthma exacerbations by 50% or more, significantly reduce or eliminate oral steroid dependence, and meaningfully improve quality of life. Matching the right biologic to your endotype is critical — a decision guided by your biomarker results.

See our full Biologic Therapies page for a detailed breakdown of each option.

Oral Steroid-Sparing Strategies

Long-term oral corticosteroid use carries serious risks: bone loss (osteoporosis), weight gain, glucose dysregulation, cataracts, and immune suppression. One of the primary goals of biologic therapy is steroid reduction or elimination. Dr. Hull's approach prioritizes minimizing steroid exposure while maintaining or improving asthma control.

Access to Clinical Trials

Through our research affiliate Lung Research Florida, qualified patients with severe asthma may have access to investigational therapies that are not yet commercially available. Clinical trials are conducted under rigorous protocols with full regulatory oversight and are provided at no cost to participants. Learn more about our research program.

The Better Breathing Grant

Cost should not be a barrier to advanced asthma care. Our Better Breathing Grant program helps qualified patients access biologic therapies and specialist care regardless of insurance status or financial situation.

Severe Asthma in South Florida: Why Location Matters

South Florida's subtropical climate creates a uniquely challenging environment for asthma sufferers. High year-round humidity promotes mold growth. Warm temperatures extend pollen seasons well beyond what patients in northern states experience. Broward County's urban corridor adds vehicle exhaust and ozone to the mix. For patients with severe or poorly controlled asthma, these environmental factors can be the difference between manageable symptoms and a genuine crisis.

Effective severe asthma management in the Plantation and Broward County area must account for these regional triggers. Our environmental trigger review and allergy testing are designed with the South Florida patient in mind.

Frequently Asked Questions

Is severe asthma the same as an asthma attack?

No. An asthma attack (exacerbation) is an acute episode of worsening symptoms. Severe asthma refers to a persistent, chronic pattern of poor control — patients with severe asthma do experience more frequent attacks, but the term describes the overall disease burden rather than a single episode.

Can severe asthma be cured?

Asthma cannot currently be cured. However, with the right treatment — particularly modern biologic therapies — many patients with severe asthma achieve what clinicians call "clinical remission": minimal or no symptoms, no exacerbations, and no ongoing steroid use. This is a realistic goal for the right patient with the right treatment. Always consult your physician to discuss your individual situation.

Do I need a referral to see Dr. Hull?

A referral is not always required. If you believe you may have severe or uncontrolled asthma, you are welcome to contact our clinic directly to schedule an initial consultation. Call us at 954-522-7226 or use our online contact form.

Will insurance cover biologic therapy?

Most major insurance plans, including Medicare and Medicaid, cover FDA-approved biologic therapies when medical necessity criteria are met. Our team will assist with the prior authorization process. For patients without coverage, manufacturer patient assistance programs and our Better Breathing Grant may provide alternatives.

What if I've already been told nothing more can be done?

If you've been told your asthma is as controlled as it can be and you're still suffering, we encourage you to seek a second opinion. The landscape of severe asthma treatment has changed dramatically in the past decade. Patients who were once reliant on continuous oral steroids are now living comfortably on biologics. There are more options available today than at any point in pulmonary medicine history.