Albuterol

Also found in the purse: a broken tablet of Albuterol a prescription drug commonly used to treat asthma and wheezing as well as Zig Zag rolling papers.

Hilton copped to the Albuterol but said the cocaine was not hers and that the purse did not belong to her and that she'd borrowed it from a friend..

Source: http://www.mtv.com/news/articles/1646803/20100830/hilton_paris.jhtml