How often are you using your inhalers? If you are using it more than four times a day, your asthma is really out of control. I am sorry, becuase I know how frustrating and depressing it is. Have you seen a pulmonary doctor? The problem with asking other people what drugs they use is that what works for one person, might not work for you. As an example, when I get a severe asthma attack which is every other month, I take 40-60 mg of Prednisone for 7 days till the attack subsides. I am also on Pulmicort twice a day, Foradil twice a day, Singulair one pill at night, Spiriva once a day, and Theophylline 300 mg twice a day. The other difference with me is that I also had lung cancer two years ago and the radiation also did some damage to my lung. My best advise is to see a pulmonary doctor.
Good luck and wish you well.