Xanax withdrawal can potentially be life-threatening, especially if it is not managed properly. In severe cases, Xanax withdrawal can lead to seizures, which can cause brain damage, coma, and even death. Other potentially serious symptoms of Xanax withdrawal include hallucinations, delirium, rapid heartbeat, high blood pressure, and fever. It is important for anyone experiencing Xanax withdrawal to seek medical attention as soon as possible to ensure proper management of symptoms and reduce the risk of complications.