Xanax Bar (Blue)

A blue Xanax bar is a blue, rectangular tablet that contains alprazolam, a prescription benzodiazepine. However, color alone is not enough to identify a pill—the imprint code is the most reliable identifier.
Common blue Xanax bars
One common example is:
Alprazolam 2 mg rectangular bar
Color: Blue
Shape: Rectangular ("bar")
Typical imprint: B707 (made by certain manufacturers)
Usually scored into four sections, allowing it to be split into smaller doses.
There are also blue 1 mg alprazolam tablets from some manufacturers, but these are often oval rather than bar-shaped.
What it's used for
Alprazolam is prescribed for:
Generalized anxiety disorder
Panic disorder
It works by enhancing the effect of the neurotransmitter GABA, which slows activity in the brain and produces a calming effect.
Onset and duration
Starts working: about 15–60 minutes
Peak effect: 1–2 hours
Effects typically last 4–6 hours, though drowsiness may last longer.
Average elimination half-life: about 11 hours in healthy adults, but it varies between individuals.
Common side effects
Drowsiness
Dizziness
Poor coordination
Slowed reaction time
Memory problems
Slurred speech
Fatigue