Anxiety is how we respond to a stressful situation. And it is completely normal to feel anxious at certain situations in life. However normal anxiety is completely different from anxiety disorder. Anxiety disorder is a mental condition that causes intense fear and worry in the person. If you are going through anxiety disorder the doctor may prescribe you to buy Xanax 2mg online. This medicine can help you to be calm and think clearly while you are in a state of panic.