Blue Xanax Bars B707 are benzodiazepines that act as central nervous system depressants that slow down the brain and nervous system activity. As a result, they slow down the brain and nervous system activity. They work by increasing the activity of gamma-aminobutyric acid, a neurotransmitter in the brain. (GABA). GABA regulates the activity of nerve cells in the brain and aids in reducing anxiety, relaxation, and sleep induction. Blue Xanax bars can help to reduce anxiety, panic, and restlessness by enhancing the effects of GABA. They may also aid in the promotion of feelings of calm and relaxation, making it easier to fall and stay asleep.