Xanax (benzodiazapines) are short acting, yet may affect the next day?

The only likely effect of Xanax the next day is your anxiety might be a bit worse. Xanax only lasts a few hours, and when it leaves BLAMMO the anxiety comes hammering back in worse than before. If you use it continuously, your brain becomes used to it and dependent to it, and your anxiety is now worse than ever without it. It is a nasty drug, and is for occasional usage only. It is extremely addictive as well, and you don't ever want to use it so much you become addicted to it.