Depends on severity. Asthma can vary in severity from mild to severe. Mild intermittent asthma is usually managed with short acting bronchodilators like albuterol (inhaled) on an as-needed basis. More persistent asthma (mild, moderate, or severe) is managed with daily inhaled corticosteroids in addition to albuterol as needed.
Depends on severity. If you have intermittent asthma a bronchodilator like albuterol is enough. If you need that bronchodilator >2x/week, if you wake up with coughing or wheezing >2x/month, or if you have an episode of asthma requiring an urgent medical visit or if your require systemic corticosteroids >1x/year then you have persistent asthma. For persistent asthma you need a controller drug like an inhaled steroid.