The severity of Xanax withdrawal symptoms depends on many factors, including the psychological state of the patient; the dosage consumed the duration of consumption and the rate at which the patient comes out of dependence. Xanax withdrawal backfires, leading to an intense return of the underlying mental illness. Feelings of panic, extreme loss, and a feeling of insanity are common during the withdrawal phase of the drug. Symptoms can last for several months and require constant monitoring.