Severe asthma is treated by combining medicines that reduce swelling in the airways with treatments that help keep them open. Most people need a regular inhaler containing an inhaled steroid and another long-acting medicine. If symptoms continue, a specialist may add other inhalers or a targeted biologic medicine. Short courses of steroid tablets may be needed for flare-ups. Treatment is tailored to test results, symptoms, age, and response.
What does severe asthma mean for treatment?
Severe asthma is asthma that remains difficult to control despite appropriate treatment. It may cause ongoing breathing problems, nighttime symptoms, or repeated flare-ups that require urgent medical care. However, frequent symptoms do not always mean that someone has severe asthma. Symptoms can remain uncontrolled for other reasons, including incorrect inhaler technique, missed doses, untreated health conditions, or continued exposure to triggers.
Before confirming severe asthma, a healthcare professional usually reviews the diagnosis, current medicines, inhaler technique, and how regularly the medicines are used. They may also assess allergies, other breathing conditions, and health problems that can affect asthma control. The Global Initiative for Asthma (GINA) provides guidance on evaluating and managing difficult-to-treat and severe asthma in adults and adolescents. A specialist assessment helps determine which additional treatments are most appropriate.
Which inhalers are used to treat severe asthma?
Inhalers are the foundation of long-term asthma treatment. They deliver medicine directly to the airways, helping control inflammation and prevent the airways from narrowing. People with severe asthma commonly need a combination inhaler containing two types of medicine:
- Inhaled corticosteroids (ICS): These medicines reduce swelling and inflammation inside the airways. They are a key part of preventing asthma symptoms and flare-ups.
- Long-acting beta-2 agonists (LABAs): These medicines relax the muscles around the airways, helping them stay open for longer.
When asthma remains uncontrolled, a clinician may consider increasing the inhaled corticosteroid dose or adjusting the combination inhaler. In some treatment plans, an inhaler containing formoterol and an inhaled corticosteroid can be used both regularly and for symptom relief. The exact regimen depends on the prescribed medicine, the person's age, and their asthma control. A LABA should not be used alone to treat asthma without an inhaled corticosteroid.
According to Mayo Clinic, inhaled corticosteroids are among the most effective long-term asthma control medicines. They must be used as prescribed, even when symptoms improve. Some people experience hoarseness or oral thrush, a yeast infection in the mouth. Rinsing the mouth after using the inhaler can help reduce these effects. A clinician or pharmacist can also check the person's inhaler technique to help ensure that the medicine reaches the lungs.
What happens if combination inhalers are not enough?
If asthma remains uncontrolled despite appropriate use of a combination inhaler, a specialist may consider additional medicines. One option is a long-acting muscarinic antagonist (LAMA), such as tiotropium. This medicine helps relax the airways and may improve lung function or reduce flare-ups in some people when added to existing treatment. The expected benefit depends on the person's asthma and current medicines.
Other add-on treatments may be appropriate when a person's symptoms are linked to particular asthma patterns or other health conditions. For example, a leukotriene receptor antagonist such as montelukast may be considered in selected cases. These medicines do not replace the main inhaled anti-inflammatory treatment. The clinician weighs the expected benefit, possible side effects, and available alternatives before making changes.
Can biologic medicines help with severe asthma?
Biologic medicines are targeted treatments that act on specific parts of the immune system involved in airway inflammation. They may be considered when asthma remains uncontrolled despite optimized inhaled treatment, particularly when a person's medical history and test results suggest that a biologic is likely to help. These medicines are usually given by injection, although some are administered through a vein.
Different biologics target different inflammatory pathways. Examples include:
- Omalizumab: Targets immunoglobulin E (IgE), an antibody involved in allergic reactions, and may be suitable for selected people with allergic asthma.
- Mepolizumab and benralizumab: Target pathways involving eosinophils, a type of white blood cell that can contribute to airway inflammation.
- Dupilumab: Blocks a receptor involved in inflammatory signals associated with certain types of asthma.
- Tezepelumab: Targets a protein involved in initiating airway inflammation and may be an option for some people with severe asthma, including certain patients whose asthma does not fit the other targeted treatment categories.
The choice is not based on symptoms alone. A specialist may review blood eosinophil levels, allergy-related IgE results, other inflammatory markers, previous flare-ups, and the need for steroid tablets. Eligibility requirements vary by medicine and country. The Cleveland Clinic explains that biologics are used alongside other asthma medicines rather than as a replacement for inhalers.
Biologics can reduce flare-ups and improve symptom control for some people, but they do not work equally well for everyone. Improvement may take weeks or months, so the specialist monitors symptoms, flare-ups, side effects, and other indicators of control to decide whether treatment is helping. In some cases, the clinician may later adjust other medicines, but people should not reduce or stop prescribed inhalers on their own.
Are steroid tablets used for severe asthma?
Oral corticosteroids, such as prednisolone or prednisone, may be prescribed for a short period when an asthma flare-up causes significant worsening. They reduce inflammation throughout the body and can help bring a serious episode under control. In a hospital setting, corticosteroids may also be given by injection when appropriate.
Taking oral corticosteroids repeatedly or for long periods can cause important side effects. These may include raised blood pressure, increased blood glucose, bone thinning, muscle weakness, a higher risk of infection, and eye problems such as cataracts. Children may also experience effects on growth. For these reasons, clinicians generally aim to limit prolonged oral steroid use when other effective options are available.
For someone who regularly needs steroid tablets to keep asthma controlled, a specialist may reassess the overall treatment plan and consider whether an add-on medicine, including a biologic, could reduce the need for them. Anyone taking long-term oral corticosteroids should discuss monitoring and any changes with their healthcare professional. These medicines should not be stopped suddenly without medical guidance.
How is a severe asthma attack treated?
A severe asthma attack is an urgent medical problem and is different from the longer-term management of severe asthma. During an attack, the airways can narrow significantly, making it difficult to move enough air into and out of the lungs. Immediate treatment aims to improve airflow, reduce inflammation, and support breathing.
Hospital treatment may include inhaled or nebulized bronchodilators, additional medicines such as ipratropium, corticosteroids, and oxygen when needed. People whose breathing remains severely impaired may require further emergency treatment and close monitoring. The National Heart, Lung, and Blood Institute (NHLBI) explains that emergency care may involve nebulized medicines, intravenous treatment, oxygen therapy, or breathing support in severe circumstances.
Seek emergency medical help if breathing becomes very difficult, symptoms rapidly worsen, or the prescribed reliever medicine does not provide adequate relief. Do not delay care while waiting for symptoms to settle. Follow the person's asthma action plan while arranging urgent assistance, and use the local emergency number when an emergency response is needed.
How can treatment keep asthma under better control?
Long-term management involves more than choosing the right medicine. Regular follow-up helps the healthcare team assess whether symptoms, nighttime waking, activity limitations, and flare-ups are improving. If asthma remains poorly controlled, the team can revisit inhaler technique, how medicines are being used, possible triggers, and other conditions that may contribute to symptoms.
A written asthma action plan is an important part of care. Developed with a healthcare professional, it explains which medicines to take, how to recognize worsening asthma, what steps to follow during a flare-up, and when to seek emergency help. The NHLBI's asthma treatment and action plan guidance outlines these elements. Keeping the plan current makes it easier for patients and caregivers to respond when symptoms change.
Reducing exposure to known triggers, avoiding tobacco smoke, and managing associated allergies or other health conditions may also support asthma control. The goal is to reduce symptoms and flare-ups while using the safest effective treatment for the individual. Treatment should be reviewed regularly rather than changed without professional guidance.
Does severe asthma treatment differ in children?
Children and adolescents may need different medicine doses, inhaler devices, and treatment options according to their age and clinical needs. Some biologic medicines are approved only for particular age groups or types of asthma, so not every option is suitable for every child. A pediatric asthma specialist may be involved when symptoms remain uncontrolled, flare-ups are frequent, or advanced treatments are being considered.
For children, the clinician also considers how treatment affects everyday activities, school attendance, sleep, and growth. Parents and caregivers should know how to help the child use their inhaler correctly and follow the written action plan. Treatment changes should be guided by the healthcare team, including when symptoms appear to improve.
When should treatment be reviewed?
Arrange a medical review when asthma symptoms continue despite prescribed treatment, become more frequent, disturb sleep, limit normal activities, or lead to repeated courses of steroid tablets or emergency visits. A specialist review may identify options that were not part of the original treatment plan. If a severe attack occurs, urgent care is needed even if the person has previously been diagnosed with asthma or has medication at home.
With an individualized plan, regular reviews, and the right combination of treatments, many people with severe asthma can achieve better symptom control and reduce their risk of flare-ups. The most suitable approach depends on the person's age, test results, treatment history, response to medicines, and access to available therapies.