Interestingly, panic attacks do seem to follow a specific pattern. Panic attacks tend to peak about 10 minutes in, and then go through a slow but steady decline that can last anywhere from 10 minutes to several hours.The resulting fatigue from a panic attack, however, can last the rest of the day depending on the severity of the attack.he above list, however, refers to how long a specific attack lasts. The disorders themselves can last the rest of your life or only a few days. Your ability to overcome the anxiety depends a great deal on the help you seek out and your willingness to commit to treatments.