From this article (http://www.webmd.com/asthma/features/asthma-rescue-inhaler-cornerstone-asthma-treatment?page=3) in WebMD:

Along with albuterol, other short-acting beta-agonists are available by prescription, including levbalbuterol, metaproterenol sulfate, pirbuterol, and terbutaline. These drugs work by relaxing the bronchial smooth muscle in the lung, opening the airways and allowing more oxygen in as you breath (sic).

There are alternatives. It was a good article.

I hope you feel much better -- soon! ^_^

Edited to add the actual link. *facepalms*