... found two unopened and unused boxes of the same prescription. But the expiration date was December 2017. Can I use at least one box? I had an asthma attack last February, 2017 due to bronchitis, hospitalized and given Symbicort for about about four months. I was then placed back on Flovent HFA 220 mcg. This maintenance asthma medicatuon isn't cheap at almost $50 a pop with insurance. I really don't want to throw them away. Your comments are appreciated