Similar: They both contain a long-acting bronchodilator (laba) and an inhaled steroid. The major difference is the laba in symbicort (budesonide and formoterol) works in 10-15 minutes and in advair about 45 minutes. The Advair Diskus is a powder inhaler which requires deep inspiration and symbicort (budesonide and formoterol) a mdi which requires slow inspiration. The full effects on both occur in 2-3 weeks.
Answered 8/7/2015
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