The short answer
Rescue inhalers are used when symptoms flare up, to open the airways quickly. Maintenance inhalers are taken on a regular schedule to reduce symptoms and support day-to-day control. Many people with COPD are prescribed both, and the two are not interchangeable.1
Rescue inhalers
Rescue inhalers — also called relievers or short-acting bronchodilators — relax the muscles around the airways, which helps air move more freely within minutes. They are typically used:
- During a flare-up or sudden increase in breathlessness.
- Before an activity that tends to bring on symptoms.
- As directed by your clinician for specific situations.
Because rescue inhalers work quickly, they can feel like the more important of the two. In practice, however, maintenance inhalers do much of the ongoing work of reducing inflammation and preventing symptoms from building up.
Maintenance inhalers
Maintenance inhalers — also called controllers — are taken regularly, often once or twice a day, whether or not you feel symptoms. They may contain:
| Type | What it does |
|---|---|
| Long-acting bronchodilator | Keeps the airways open over many hours. |
| Inhaled corticosteroid | Reduces inflammation in the airways. |
| Combination inhaler | Contains both, in a single device. |
Because maintenance inhalers work gradually, missing doses may not be felt immediately — which can make it tempting to skip them. Consistent use is what supports the long-term effect.
Combination inhalers
Some inhalers combine two or three medicines in a single device. This can simplify daily routines and reduce the number of devices to manage. The trade-off is that the role of each component may be less obvious, and it becomes more important to know exactly what your inhaler contains.2
If you are not sure whether one of your inhalers is a rescue or a maintenance medicine, that is a reasonable question for your pharmacist or clinician. The answer usually determines when and how often it should be used.
Keeping them straight
Practical steps that some people find helpful:
- Storing the rescue inhaler in a consistent, easy-to-reach place.
- Keeping maintenance inhalers near something you do daily — for example, a toothbrush.
- Using a written medicine list, updated regularly.
- Asking for a demonstration if a device is new or unfamiliar.
- Checking dose counters on devices that have them.
Inhaler technique matters more than most people expect. Small differences in timing, coordination, or inhalation can affect how much medicine reaches the airways. If technique has not been reviewed recently, it may be worth asking.
For related reading, see our article on What to Ask When an Inhaler Device Changes and our guide Understanding a Respiratory Care Plan.
What to discuss with your care team
- Which of my inhalers is a rescue medicine, and which is a maintenance medicine?
- How often should I use each one, and in what situations?
- What should I do if I miss a dose of a maintenance inhaler?
- Is my inhaler technique still correct?
- Should I track how often I use my rescue inhaler?
- Are there any interactions I should be aware of with my other medicines?
Sources
- National Heart, Lung, and Blood Institute. COPD: Treatment and Management.
- Global Initiative for Chronic Obstructive Lung Disease (GOLD). Global Strategy for the Diagnosis, Management, and Prevention of COPD. Recent reports.
- U.S. Food and Drug Administration. How to Use Your Inhaler.
- American Lung Association. Inhalers and COPD.