Bronchiolitis is a viral lung infection that primarily affects infants and young children, causing inflammation in the smallest airways and making breathing difficult. While most cases are mild and resolve with supportive care at home, understanding the available treatments and ongoing research can help parents and caregivers navigate this common but sometimes worrying condition.

What Treatment Approaches Are Available for Bronchiolitis?

When a child develops bronchiolitis, the main goal of treatment is to manage symptoms and support the body’s natural ability to fight the viral infection. Because this condition is caused by viruses, antibiotics do not work and are not recommended. The approach to care depends largely on how severe the symptoms are and whether the child can breathe comfortably and stay hydrated at home.^[1]

Most children with bronchiolitis will recover without needing hospital care. However, parents need to understand what treatments are proven to help and which ones have been shown not to work. Over the years, medical research has tested many different medications and therapies for bronchiolitis, but only a few have demonstrated real benefit. The mainstay of management remains what doctors call supportive care, which means helping the child’s body through the illness rather than trying to target the virus directly.^[2]

Treatment decisions are influenced by several factors including the child’s age, whether they were born prematurely, and whether they have any underlying health conditions such as heart disease or chronic lung problems. Children with these risk factors may experience more severe symptoms and require closer monitoring or more intensive care. The seasonal nature of bronchiolitis, which peaks during winter months, also means that healthcare systems need to prepare for increased demand during these periods.^[4]

Standard Home-Based Treatment

For the majority of children, bronchiolitis can be managed safely at home with simple but effective measures. The cornerstone of home treatment is ensuring the child receives enough fluids to prevent dehydration. Infants may have difficulty feeding because their blocked nose makes it hard to breathe while drinking. Parents are encouraged to offer smaller, more frequent feeds to help maintain hydration. Breast milk or formula should continue as normal, though in smaller amounts at each feeding if the baby is struggling.^[6]

Keeping the nasal passages clear is another critical aspect of home care. Since young babies breathe primarily through their nose, removing mucus becomes essential. Parents can use nasal saline drops or spray to loosen thick mucus, followed by gentle suctioning with a bulb syringe or nasal aspirator. This process may need to be repeated multiple times throughout the day and especially before feedings and sleep. Although it can be uncomfortable for the baby, removing mucus significantly improves their ability to breathe and feed.^[9]

Creating a humid environment can help thin the mucus in the airways and nose, making it easier to clear. Parents can use a cool-mist humidifier in the child’s room or bring them into a steamy bathroom for short periods. It is important to avoid hot steam that could cause burns. Keeping the child’s head slightly elevated during sleep may also make breathing more comfortable, though pillows should never be placed in a crib with an infant due to suffocation risk.^[8]

Fever management is another component of home care. If a child has a fever and appears uncomfortable, parents may give age-appropriate doses of acetaminophen or ibuprofen. However, aspirin should never be given to children under 20 years of age due to the risk of a serious condition called Reye syndrome. Over-the-counter cough and cold medicines are not recommended for young children with bronchiolitis, as they have not been proven effective and may cause side effects.^[6]

Hospital-Based Treatment Options

Some children with bronchiolitis require hospital admission for more intensive monitoring and treatment. The decision to hospitalize is based on the severity of symptoms, the child’s age, and any underlying health conditions. Infants under three months old, those born prematurely, and children with heart or lung disease are at higher risk for severe illness and may need hospital care even with moderately severe symptoms.^[7]

In the hospital, the primary treatment remains supportive care, but with additional medical resources. One of the most important hospital interventions is supplemental oxygen therapy. When bronchiolitis causes the level of oxygen in a child’s blood to drop too low, oxygen can be delivered through various methods including nasal prongs, a face mask, or in severe cases, through more advanced breathing support systems. Healthcare providers monitor oxygen levels continuously using a device called a pulse oximeter, which clips onto a finger or toe and measures oxygen saturation without needing blood samples.^[9]

Hydration support is another crucial aspect of hospital care. If a child is too unwell to drink enough fluids by mouth, they may receive intravenous fluids through a small tube inserted into a vein. This ensures the body stays properly hydrated while the child recovers enough to resume normal feeding. Some hospitals also have specialized suction clinics where respiratory therapists perform deeper suctioning to clear mucus from the airways, which can provide significant relief for struggling infants.^[14]

The duration of symptoms varies, but bronchiolitis is typically worst during the first week of illness, particularly between days three and seven. During this critical period, the virus generates large amounts of thick mucus that can severely obstruct breathing. Hospital staff monitor children closely during these days and provide increased support as needed. Most children show improvement after this peak period, though the cough may persist for two to four weeks after the acute illness resolves.^[1]

Medications Tested for Bronchiolitis

Over the years, doctors and researchers have tested numerous medications in an attempt to find effective treatments for bronchiolitis. Understanding which medications do not work is just as important as knowing which ones might help. This knowledge prevents unnecessary treatments that offer no benefit and may cause side effects.

Bronchodilators are medications that relax the muscles around airways and are commonly used to treat asthma. For many years, doctors tried using bronchodilator medications such as albuterol and salbutamol in children with bronchiolitis, hoping they would open the narrowed airways. However, large research studies have clearly shown that these medications do not improve outcomes in most children with bronchiolitis. Current medical guidelines from organizations like the American Academy of Pediatrics do not recommend routine use of bronchodilators for this condition.^[14]

Another bronchodilator called epinephrine, which can be given as a nebulized mist that children breathe in, has also been studied extensively. While some early research suggested it might provide short-term improvement in breathing, more recent and comprehensive studies have not found significant benefit. Most children who receive epinephrine do not experience meaningful improvement in their symptoms or shorten their hospital stay. Therefore, this medication is also not routinely recommended, though some doctors may still try it in specific situations.^[12]

Corticosteroids, which are anti-inflammatory medications, seemed like promising candidates for treating bronchiolitis since inflammation plays a major role in causing the airway obstruction. Despite this logical reasoning, multiple large clinical trials involving thousands of children have definitively shown that corticosteroids do not improve symptoms, reduce hospital admission rates, or shorten the duration of illness. These medications, which include prednisone and dexamethasone, are not recommended for treating acute bronchiolitis.^[12]

Antibiotics are designed to fight bacterial infections, not viral infections. Since bronchiolitis is caused by viruses, antibiotics have no role in treatment unless a child develops a secondary bacterial infection such as pneumonia or an ear infection. Using antibiotics unnecessarily contributes to antibiotic resistance, a growing public health concern. Doctors only prescribe antibiotics if there is clear evidence of a bacterial complication.^[9]

Emerging Treatments Under Investigation

While most traditional medications have proven ineffective for bronchiolitis, researchers continue to explore new treatment approaches. One therapy that has shown some promise in clinical studies is hypertonic saline, a saltwater solution that is more concentrated than normal saline. This solution is delivered as a fine mist through a nebulizer, which the child breathes in.

The theory behind hypertonic saline is that the concentrated salt solution draws water into the airways, helping to thin the thick mucus and making it easier to clear. Several research studies have examined whether nebulized hypertonic saline can reduce the length of hospital stay or improve symptoms in children with bronchiolitis. Some studies have found that when three percent hypertonic saline is given together with a bronchodilator, it may decrease hospital stay by a modest amount, though other studies have not confirmed this benefit. The evidence remains mixed, and different hospitals and countries have different practices regarding its use.^[12]

The concentration of the saline solution appears to matter. Studies have specifically looked at three percent hypertonic saline rather than stronger concentrations. The solution is usually mixed with a small dose of a bronchodilator medication to prevent the saline from causing temporary narrowing of the airways. Children typically receive several nebulizer treatments per day when this therapy is used. More research is needed to determine exactly which children might benefit most from this treatment and whether it should become a standard part of care.^[14]

Another area of investigation involves recombinant human DNAse, an enzyme medication that breaks down DNA material released from dead cells, which contributes to thick mucus. This medication has been used successfully in other lung conditions, but studies in children with bronchiolitis who were not on mechanical ventilation showed no clinical benefit. It is not currently used for treating bronchiolitis.^[14]

Researchers have also studied various antiviral medications designed to target respiratory syncytial virus directly. One such medication called ribavirin was tested in children with severe bronchiolitis, but studies did not demonstrate clear benefits that outweighed the medication’s cost, complexity of administration, and potential side effects. Ribavirin is not recommended for routine treatment of bronchiolitis.^[7]

Chest physiotherapy, which involves techniques to help loosen and clear mucus from the lungs through physical manipulation and positioning, has also been investigated. Despite being used in some settings, research has not shown that chest physiotherapy improves outcomes or speeds recovery in children with bronchiolitis. Current guidelines do not recommend this intervention for bronchiolitis.^[12]

Prevention Strategies and Immunization

Because treatment options for acute bronchiolitis remain limited, preventing the infection in the first place has become an important focus. Several preventive strategies are available, particularly for high-risk infants who are most vulnerable to severe illness.

In early 2025, the Australian Government launched a free program called the RSV Mother and Infant Protection Program, which represents a significant advance in prevention. This program includes two main components: vaccination for pregnant women and immunization for babies. When pregnant women receive the RSV vaccine during pregnancy, they produce antibodies that pass to their baby, providing protection during the vulnerable first months of life. For babies, a medication called palivizumab, which is a monoclonal antibody, can be given to provide direct protection against respiratory syncytial virus.^[3]

Palivizumab is not a vaccine but rather an injection of laboratory-made antibodies that specifically target RSV. These antibodies help the immune system fight off RSV infection if the baby is exposed to the virus. The medication is given as a monthly injection during RSV season, typically from fall through spring. It is primarily recommended for infants at highest risk, including those born prematurely, those with chronic lung disease or congenital heart disease, and those with compromised immune systems. Studies have shown that palivizumab can reduce the rate of hospitalization for RSV bronchiolitis in these high-risk groups.^[7]

Beyond these medical interventions, simple hygiene measures play a crucial role in preventing the spread of viruses that cause bronchiolitis. The viruses spread through respiratory droplets and can survive on surfaces for several hours. Frequent handwashing with soap and water is one of the most effective ways to prevent transmission. Parents and caregivers should wash their hands before touching or feeding a baby, especially during cold and flu season.^[6]

Avoiding exposure to tobacco smoke is critical for preventing bronchiolitis and reducing its severity. Children exposed to secondhand smoke have a significantly higher risk of developing bronchiolitis and experiencing more severe symptoms. Parents who smoke should never smoke inside the home or car, and ideally should quit smoking entirely to protect their child’s respiratory health. Maternal smoking during pregnancy also increases a baby’s risk of severe bronchiolitis.^[2]

Limiting a young infant’s exposure to crowded settings and to people with cold symptoms, when possible, can help reduce infection risk. While this is not always practical, especially if there are older siblings who attend school or daycare, being mindful of exposure during the peak bronchiolitis season can be helpful. If someone in the household has a cold, they should wash their hands frequently and avoid close face-to-face contact with the baby.^[3]

Most Common Treatment Methods

• Supportive Care at Home
  • Ensuring adequate fluid intake through frequent, smaller feedings to prevent dehydration
  • Using nasal saline drops or spray followed by gentle suctioning to clear nasal passages
  • Creating humid air with cool-mist humidifiers or steamy bathrooms to help thin mucus
  • Administering acetaminophen or ibuprofen for fever relief and comfort
  • Positioning the child with head slightly elevated to ease breathing during sleep
• Hospital-Based Supportive Therapy
  • Supplemental oxygen delivered through nasal prongs, face mask, or advanced breathing support when blood oxygen levels drop
  • Continuous monitoring of oxygen saturation using pulse oximetry
  • Intravenous fluids to maintain hydration when oral intake is insufficient
  • Deep suctioning by respiratory therapists to remove thick mucus from airways
• Preventive Immunization
  • RSV vaccination for pregnant women to provide passive immunity to their babies
  • Palivizumab monoclonal antibody injections given monthly during RSV season for high-risk infants
  • Protection programs specifically targeting premature infants and those with chronic heart or lung conditions
• Investigational Treatments
  • Nebulized three percent hypertonic saline mixed with bronchodilators, showing potential to reduce hospital stay in some studies
  • Ongoing research into epinephrine nebulizer treatments, though current evidence shows limited benefit