They stimulate the airways to open quickly to allow air back into the lungs. Quick-relief medications are useful because they have few side effects and can be taken as soon as wheezing starts. Agonists are also known as bronchodilators. Bronchodilators can be used to relax the muscles of the airways and allow air to flow freely in the lungs. They are used on an as-needed basis and work immediately when used.
Bronchodilators are small and convenient enough to be carried discreetly anywhere.
Those people who take this medication usually have very severe asthma. Taking it on a long-term basis is not recommended because of side effects, but some people with severe uncontrollable asthma do take it under the care of their physician. Ask the doctor how much and how often your medication should be taken. Ask the doctor about any possible side effects your medication has and how you can avoid them. Ask the doctor or pharmacist if your medication can be taken with other medications that you are currently taking.