Controller vs. Rescue Inhalers: What’s the Difference?
Posted On: 03/27/2026
If you or your child has asthma, your doctor may prescribe two types of inhalers. These are called controller inhalers and rescue inhalers.
Both help with asthma, but they do different jobs. Knowing when to use each one can help you breathe easier and prevent asthma attacks.
A quick way to know the difference
Think of it this way:
- Controller inhaler = prevent problems
- Rescue inhaler = treat symptoms
Both inhalers work best when you use them the right way.
What is a controller inhaler?
A controller inhaler helps prevent asthma symptoms before they start.
It works by lowering swelling in your airways. When your airways stay calm and open, it is easier to breathe.
Controller inhalers are taken every day, even when you feel fine. Think of a controller inhaler like daily protection for your lungs. Your doctor may also call this a maintenance inhaler.
Controller inhalers help:
- Prevent asthma flare-ups
- Reduce coughing and wheezing
- Help you breathe easier during the day and night
- Lower the chance of urgent care or ER visits
What is a rescue inhaler?
A rescue inhaler works fast when asthma symptoms start.
It helps relax the muscles around your airways so air can move through more easily.
Rescue inhalers are used when you have symptoms like:
- Wheezing
- Coughing
- Chest tightness
- Trouble breathing
Many people carry their rescue inhaler with them in case symptoms start suddenly. Rescue inhalers work quickly, but they do not prevent asthma symptoms from coming back.
When should you use each inhaler?
Controller inhaler
- Use every day as your doctor tells you
- Use it even if you feel well
- Helps keep asthma under control
Rescue inhaler
- Use when asthma flare-ups begin
- Helps you breathe better quickly
- Not meant for everyday use
Your asthma action plan will tell you when to use each inhaler.
When to talk to your doctor
If you need your rescue inhaler more than a couple times a week, your asthma may not be fully under control.
Your doctor may want to adjust your medicines or update your asthma action plan.
Getting the right treatment can help you have:
- Fewer asthma symptoms
- Better sleep
- Fewer urgent care or ER visits
Get PCHP support
If you or your child has asthma, Parkland Community Health Plan is here to help. Our asthma support program can help you:
- Understand your medicines
- Find a provider
- Manage asthma symptoms
- Create or update your asthma action plan
Call Member Services and ask to speak with the Condition Management team.