What are bronchodilators?

Medicines called bronchodilators help to relax the muscle spasm and allow passage of more air through the airways. They are usually inhaled, but can also be given as a pill or liquid. In severe episodes, an injection of epinephrine may be given if inhalation is not sufficient. These medicines are called rescue medicines since they act to open up the airways almost immediately. Epinephrine is also used in the event of anaphylaxis.

Bronchodilators are medicines that relax (dilate) the airways of the lungs (bronchial tubes). This makes it easier for a person to breathe in more air.

Bronchodilators are usually given through an inhaler, which makes a fine mist that the person breathes through the mouth and into his or her lungs. Inhaled bronchodilators are preferred for treating respiratory problems, such as asthma, because they cause few side effects and are effective.

Bronchodilators are sometimes given in pill form or as an injection under the skin for a person who cannot use an inhaler.