Usually one puff of Symbicort (http://www.drugs.com/symbicort.html) is recommended. Symbicort is a long lasting medication and it is meant to be taken just twice daily. Taking more then one dose at a time is not recommended as you are much more likely to have a serious reaction to the medication. You should never take Symbicort while you are having breathing difficulty episode, your doctor will probably prescribe you an inhaler with a shorter lasting medication for those attacks. Remember to tell your doctor if you have any noticeable side effects while taking Symbicort.