Buy Yellow Xanax bar to Treat Anxiety What does Xanax bar do? Xanax bar 2mg exists as the short-term acting benzo. And being short-term acting, its effects survive in the body for 6 hours after the last dosage. However, sometimes properties may vary from sufferer to sufferer due to different health statuses and medical conditions. Furthermore, it is approved for the treatment of anxiety and panic attacks for the short term. The duration may scale between 2 to 3 weeks. Although, it may go up and down if the necessity arises to do so. Having benzos for long-term consumption can lead to drug dependency and addiction. Therefore, use it in a directed manner rather than enhancing with self-perception. To get you adequate treatment duration, meet the doctor.