Another substance that poses a real danger from its withdrawal symptoms is any drug in the benzodiazepine class, like Xanax, Klonopin, and Valium. Withdrawal from these sedatives can cause tremors, mood swings, difficulty sleeping, hyperventilation, panic attacks, and seizures. It can also cause psychotic symptoms, possibly severe, including depersonalization, perceptual changes, delirium, and hallucinations. There are risks that during an episode of psychosis someone will get hurt. People have died from unsupervised benzodiazepine withdrawal.
