Buying Xanax online is a medication for anxiety and panic disorder. The generic name for Xanax is alprazolam. It works by blocking the nervous system and amplifying the activity of a chemical messenger (GABA) that suppresses abnormal and excessive activity of nerve cells in the brain. do not take alprazolam; longer than consulting your doctor. Long-term use of alprazolam is not recommended for conditions such as insomnia, anxiety, and panic attacks.