One is a fast acting but is short term. The other is a slower acting but has a longer lasting affect. Steroid inhalers are used in moderate to severe asthmatics. They are designed to reduce the inflammation of the lungs. They must be taken daily to achieve their maximum effect.
Leukotrine inhibitors block a substance called leukotrines, which cause asthma symptoms.
Taking this on a regular basis helps prevent a attack when being around many of the things that can trigger and asthma attack. The American Academy of Allergy, Asthma and Immunology 2. The Journal of the American Medical Association Asthma Information Center 3. The American Lung Association of Washington 4. The US Department of Health and Human Services 5.