Yes, it is possible to get sick from Xanax withdrawal. Withdrawal symptoms from Xanax (alprazolam) can range from mild to severe and can include anxiety, insomnia, tremors, sweating, nausea, vomiting, and seizures. The severity and duration of withdrawal symptoms can vary depending on factors such as the dosage and length of time the drug was used, as well as individual factors such as metabolism and overall health. In some cases, Xanax withdrawal can be dangerous and even life-threatening, so it is important to seek medical help if you are experiencing symptoms of withdrawal.