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Just like the name suggests, relievers are designed to relieve asthma attacks. They are also called bronchodilators because they dilate (or widen) the airway tubes (bronchi and bronchioles) by relaxing the tightened muscles in the airway walls. A reliever opens up your airways and makes it easier to breathe. Relievers have no effect on the inflammation associated with asthma.

Your doctor will tell you when you should use your reliever. Remember, not all asthma medicines are the same. There are all sorts of puffers. Some have medicines that give you quick relief (relievers) when you're having an asthma attack. Others work to prevent asthma and must be taken regularly.

You should have your reliever with you at all times, just in case you have an attack.