Although albuterol is not a commonly abused drug per se, it can be abused to get a euphoric feeling. Whether Paris Hilton had the drug for a medical purpose or illegally is not clear as of yet, however the cocaine charge will likely be the more serious offense.
Albuterol can be used to treat asthma, as well as congenital myasthenic syndromes. It is also known to be used to burn fat among dieters, and is banned in many sports as a performance enhancing drug. Hilton has admitted that the albuterol, as well as some rolling papers in her bag were hers, however claims that the cocaine found was not.
