I'm sorry to hear Cait is having this happen!! Tremors and a nervous feeling are some of the 'normal' side effects of this drug as well as some of the other asthma inhalors. Violently shaking does not sound like a tremor to me!
Please have this checked out with her Dr. ASAP! - Here is a link to this Drugs Description....
Bunches of hugs to you all!! Please let me know what happens?!