Budesonide inhalation suspension is a liquid corticosteroid medication that you breathe in through a nebulizer to control asthma. It is FDA-approved for maintenance treatment and prevention of asthma symptoms in children ages 12 months to 8 years. Sold under the brand name Pulmicort Respules, it works by reducing inflammation and swelling inside the airways, making breathing easier over time. It is not a rescue inhaler and will not stop an asthma attack that is already happening.
How It Works
Budesonide belongs to a class of drugs called inhaled corticosteroids. When the mist reaches the lining of the airways, it calms the immune response that causes swelling, excess mucus, and tightening of the airway muscles. Over days to weeks of consistent use, the airways become less reactive to triggers like allergens, cold air, or exercise. This is why it is classified as a “controller” medication rather than a quick-relief treatment.
Because it acts locally inside the lungs, a much smaller amount of the drug enters the bloodstream compared to oral steroids. That targeted delivery is what makes it suitable for long-term daily use in young children.
Who It Is Prescribed For
The FDA indication is specific: children between 12 months and 8 years old who need daily asthma control. It is particularly useful for this age group because toddlers and young children often cannot coordinate the deep breath needed for a standard inhaler, even with a spacer. A nebulizer turns the liquid into a fine mist that the child simply breathes in normally through a face mask or mouthpiece, which makes the process much easier for both the child and the parent.
Older children and adults with asthma typically use dry-powder or metered-dose inhalers instead, though a doctor may occasionally prescribe the nebulized form for patients of any age who have difficulty using handheld devices.
Available Strengths and How It Is Given
Budesonide inhalation suspension comes in single-dose ampules (called Respules) in two strengths: 0.25 mg per 2 mL and 0.5 mg per 2 mL. Each ampule contains exactly one treatment’s worth of liquid.
To use it, you twist open a single ampule and squeeze the contents into the nebulizer cup. The nebulizer connects to a compressor that converts the liquid into a breathable mist. A jet nebulizer is the standard device for this medication; ultrasonic nebulizers are generally not recommended because they may not deliver the drug effectively. The treatment typically takes 5 to 10 minutes per session, and most children use it once or twice daily depending on the severity of their asthma.
After each treatment, wash your child’s face (or wherever the mask sat) with water to remove any medication that settled on the skin. Rinsing the mouth and spitting afterward also helps reduce the chance of side effects in the throat and mouth.
How Quickly It Works
This is an important point that catches many parents off guard: budesonide inhalation suspension does not provide immediate relief. Some improvement in symptoms may be noticeable within two to eight days of consistent use, but the full benefit often takes four to six weeks to develop. Because of this gradual onset, it needs to be used every day as prescribed, even when your child seems to be breathing well. Stopping and starting the medication based on symptoms undermines its ability to keep airway inflammation under control.
If your child is wheezing or having trouble breathing right now, a separate quick-relief bronchodilator (a rescue inhaler) is the appropriate treatment. Budesonide is not designed to open airways during an acute episode.
Common Side Effects
The most frequently reported side effects are relatively mild and overlap with symptoms of a common cold. These include cough, runny or stuffy nose, sore throat, and hoarseness or voice changes. Some children experience nausea, headache, or a general feeling of being unwell, especially when starting the medication.
One side effect worth knowing about is oral thrush, a fungal infection that appears as white patches on the tongue or inside the mouth. Inhaled corticosteroids create a warm, moist environment in the mouth that yeast can thrive in. Rinsing the mouth with water after every treatment significantly lowers this risk.
Less common side effects include easy bruising, skin changes, ear pain, dizziness, and muscle stiffness. These tend to occur more often at higher doses or with prolonged use.
Immune System and Growth Considerations
Because budesonide is a corticosteroid, it can slightly suppress the immune system. Children using it should avoid close contact with anyone who has chickenpox or measles if they haven’t already been vaccinated or previously infected. If your child is exposed to either illness while on this medication, let your pediatrician know promptly, as the infection could be more severe than usual.
Long-term use of inhaled corticosteroids in children has been associated with a small reduction in growth velocity, particularly during the first year or two of treatment. The effect is typically modest, on the order of about a centimeter less growth per year compared to children not using inhaled steroids. Most pediatricians monitor height regularly in children on this medication to make sure growth stays on track. The consensus in pediatric asthma care is that the benefits of controlled asthma, which itself can impair growth when poorly managed, generally outweigh this small effect.
Storage and Handling
Budesonide ampules should be stored upright at room temperature and protected from light. They come sealed in a foil envelope, and once that envelope is opened, any unused ampules inside should be used within two weeks. Unopened foil envelopes can be kept until the expiration date on the packaging. If an individual ampule has been opened but not fully used, discard the remaining liquid rather than saving it for later.
Before use, gently shake the ampule using a swirling motion. The suspension can settle, so mixing it ensures you get the correct concentration with each treatment.
What It Does Not Treat
Budesonide inhalation suspension is specifically a preventive asthma medication. It will not relieve sudden breathing difficulty, chest tightness during an active flare, or exercise-triggered bronchospasm that is already underway. Children with asthma who use a daily controller like budesonide still need access to a fast-acting rescue inhaler for breakthrough symptoms. The two medications serve different roles: budesonide keeps the underlying inflammation low day to day, while a rescue inhaler relaxes tightened airway muscles within minutes during an episode.