Cortisol is a natural hormone produced by the adrenal glands. Early each morning, a burst of cortisol is usually released into your bloodstream.
Corticosteroids are one of several types of "steroids." The type of steroid used in the treatment of asthma is called a glucocorticosteroid (corticosteroid). Corticosteroids are different from anabolic steroids that are sometimes abused by athletes to promote the development of muscle mass.
The steroids used in asthma treatment are corticosteroids. These steroids have anti-inflammatory effects. They are not the androgen-like muscle building steroids that have had a bad reputation for side effects among athletes and body builders. Read more about steroid phobia.