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.
BRAND NAME(S): Xopenex. USES: Levalbuterol is used to treat wheezing and shortness of breath that commonly occur with lung problems (such as asthma, chronic obstructive pulmonary disease). Controlling these symptoms can decrease time lost from work or school.