Support WBURStudy Questions Mainstay Treatment For Mild AsthmaPlay02:34Download AudioApril DemboskyAugust 26, 2019 ShareAmong patients age 12 and older in a study of people with mild, persistent asthma, more than half did just as well, or better, on a placebo as they did on a steroid inhaler used twice per day to prevent symptoms. (Getty Images)