Symbicort is a combo med-it has budesonide/steroid anf formetarol-long acting bronchodilator. The long acting bronchodilators-can cause-in some people-increase heart rate, tremors, some anxiety/nervousness.***itcan cause these symptoms in people who have no bipolar, anxiety, MI. ***check with your pharmacist and pdoc to see if they think affecting you because it mayb making symptoms worse or not. Or they could feel you really need and are trying to look at side effects vs how much you need it. Also there are 2other meds that are similar-your md might recommend advair or dulera.***I am not md