I am an asthmatic and have just begun using this drug with my new Nebuliser. I had been on Albuterol but it was making me feel very nervous and hyper after using it. And I found that about an hour after having it, I would reach the pit and feel extremely exhausted and drowsy. I find that Xopenex is quite better compared to Albuterol. Even though I am feeling a little tensed and edgy after having Xopenex, I do not feel very hyper and does not drop me suddenly to the bottom after some time. I would be grateful if someone could share their experience with this drug with me so that I can get more information about this new drug that I am having.