You are highly advised to be careful about using and misusing any drug. This pertains to all types of prescription and/or even non-prescription medications. We are speaking right now specifically of Xanax as well as other anti-anxiety drugs.
One of the reasons why people run into so much trouble while using Alprazolam is because they mix it with alcohol or other substances which make it dangerous. This can lead to all kinds of problems such as worsening of anxiety or seizures as well as sudden shock or worse yet even coma or death.
Another common problem is perhaps forgetting you just took your last dose and then taking another one. If you are a person who needs to keep better track of dosages you can find pill containers that allow you to store daily doses by week or month.