To get near this attractive network size, social bots start by befriending each other. Next, the social bots solicit human users. As the bots and humans become friends, the bots drop their original connections with each other, eliminating traces of artificiality. Finally, the bots explore their newfound social network, progressively extending their tentacles through friends of friends.
Xopenex is the active isomer of albuterol (called R-albuterol or levalbuterol). 1  The chemical structures of medications exist as a mixture of mirror images of one another (referred to as a racemic mixture), and only one of these forms is the active medication.
Xopenex HFA is manufactured by Sepracor, Inc. No generic versions of Xopenex HFA are available in the United States. Yet, if you search the Internet for  generic Xopenex HFA, you may find a number of companies selling it. The fact is that these medicines are fake, substandard, and potentially dangerous.