Hello Athena...I had the same problem with albuterol, also induced my arrythmias so the docs scratched that and put me on xopenex. I have been on that for years now. I find that it doesn't make me as shaky and my heart thanks me for switching, my arrythmia is supra ventricular tachycardia, the albuterol made my heart race to 170's with a few doses on board. With Xopenex, my heart rate rarely goes beyond 120. I do know that Xopenex isn't supposed to be given really frequently, usually it is a three times a day drug, but more can be given in the case of bronchospasm. I find that it works well on my airways. Hugs, Jenn <img src="i/expressions/face-icon-small-smile.gif" border="0">